Spectral Irradiance Calibrations

1 Page 1 NIST M NIST M How Measureme Measureme ward W. Yo ent Service S ent Service S oon and Ch es: Spectr es: Spectr U.S. Nati harles E. G ral Irradral Irrad . Departm onal Instit Gibson diancediance ment of C tute of Sta e Cal... Open at page → 3 Page 3 NIST Special Publication 250-89 NIST MEASUREMENT SERVICES : Spectral Irradiance Calibrations Howard W. Yoon and Charles E. Gibson Optical Technology Division Physical Measurement Laboratory National Institute of Standard... Open at page → 4 Page 4 National Institute of Standards and Technology Special Publication 250-89 Nat. Inst. Stand. Technol. Spec. Publ. 250-89, 132 Pages, (July 2011) CODEN: NSPUE2 NIST PRINTING AND DUPLICATION OFFICE GAITHERSBURG, MD: 2011 Open at page → 5 Page 5 iii PREFACE The calibration and related measurement services of the National Institute of Standards and Technology are intended to assist the makers and users of precision measuring instruments in achieving the highest p... Open at page → 6 Page 6 iv ABSTRACT This document describes the process of the realization, the maintenance and the dissemination of the spectral irradiance scale and its accompanying uncertainties at the National Institute of Standards and Tec... Open at page → 7 Page 7 v TABLE OF CONTENTS ABSTRACT ....................................................................................................................... iv 1. Introduction ....................................................... Open at page → 8 Page 8 vi LIST OF FIGURES Figure 1. The primary scale realization for the NIST spectral irradiance scale. The cryogenic radiometer calibrates the trap detectors for optical power by substitution with electrical power. The apert... Open at page → 9 Page 9 vii LIST OF TABLES Table 1. The current spectral irradiance calibration tests offered. ................................... 3 Table 2. The specifications of the monochromator system and the detectors used to measure the s... Open at page → 10 Page 10 1 1. Introduction This document supersedes the NBS Special Publication 250-20 (1987). In 2000, a new detector-based spectral irradiance scale was realized using a high-temperature blackbody in conjunction with absolute f... Open at page → 11 Page 11 2 1.1 Spectral Irradiance Spectral irradiance is the measure of the optical power, Φ, incident on an area, dA, per unit wavelength, d λ, and is denoted by λ λ ddA d E ⋅ Φ = 2 . (1) A commonly used unit to denote spectral... Open at page → 12 Page 12 3 1.3 Description of current services in spectral irradiance calibrations The current calibration services according to the test numbers and the descriptions of the tests are listed in Table 1. The tests are grouped acco... Open at page → 13 Page 13 4 2. Scale Realization At the National Institute of Standards and Technology, the spectral irradiance scale is realized using a detector-based scale. The NIST spectral irradiance scale is realized using filter radiometer... Open at page → 14 Page 14 5 2.1 Measurement equation for temperature determination The radiance temperature of the high-temperature blackbody is found using a measurement equation, which describes the optical flux transfer with circular and coaxi... Open at page → 15 Page 15 6 nm where the spectral power responsivity of the Si-trap transfer detector can be smoothly interpolated between the discrete laser calibration wavelengths of the cryogenic radiometer. The uncertainties of the spectral p... Open at page → 16 Page 16 7 VTBB was set at 2687 K and the temperature of the HTBB was set at 2950 K. Although the temperatures are different, the radiance ratios did not differ even at 250 nm, where the differences are greatest, by more than a f... Open at page → 17 Page 17 8 source-based determinations also agree with the previous measurements, which also showed differences of < 0.5 % from 250 nm to 1000 nm [ T27T]. The spectral radiances from the VTBB are determined using Planck radiance... Open at page → 18 Page 18 9 HTBB can be performed in about 30 min, and the temperature of the HTBB is stable during these measurements. For clarity only the temperatures measured using FR4 are plotted with the 0.21 K ( k = 2) uncertainties. The t... Open at page → 19 Page 19 10 responsivity of the spectroradiometer is assigned using the known spectral irradiance of the HTBB at the input aperture of the ISR, () 2 2 BB , , D rTL E HTBB πλ λ = , (6) with the measurement parameters as defined in... Open at page → 20 Page 20 11 0 500 1000 1500 2000 2500 3000 10 -2 10 -1 10 0 10 1 10 2 Wavelength [ nm ] Spectral Irradiance [ μ W / cm 2 / nm ] HTBB 2950 K 1000 W FEL Figure 5. The spectral irradiance of the HTBB at 2950 K with the measurement p... Open at page → 21 Page 21 12 3.1 Spectroradiometer system The spectroradiometer system is also shown in detail in Fig. 6. The spectral irradiances of the sources are measured using an integrating sphere receiver (ISR) with a circular opening with... Open at page → 22 Page 22 13 Figure 6. The optical layout showing the monochromator table with the positions of the input and the exit optics. A double monochromator in a Czerny-Turner design is used for dispersion and stray-light rejection. Thre... Open at page → 23 Page 23 14 Table 3. The order-sorting filters used in FASCAL 2 with the 6-position filter wheel placed at the entrance to the monochromator. Filter Specification [nm ] Operation Wavelengths [nm ] Filter wheel position Filter Typ... Open at page → 24 Page 24 15 1000 -0.5 0.0 0.5 10 -1 10 0 10 1 10 2 10 3 100*( S i- S mean ) * S mean -1 Wavelength [ nm ] InGaAs Diode Si Diode PMT Spectral Irradiance [ μ W / cm 2 nm ] Figure 7. The left axis denotes the percent differences fro... Open at page → 25 Page 25 16 and at 1800 nm is due to the presence of water-vapor absorption at these wavelengths leading to increased fluctuations in the measured signals. With the exceptions of the measurements at 1400 nm, 1800 nm, and 2400 nm,... Open at page → 26 Page 26 17 spectral irradiance of the FEL lamp peaks near 900 nm. The wavelength positioning is reproducible to ± 0.015 nm with changes in the gratings using the motorized grating turret. 600 900 1200 1500 1800 2100 2400 -0.2 -0... Open at page → 27 Page 27 18 4. Uncertainty Analysis of the Spectral Irradiances Issued on FEL Lamps The discussion of the uncertainties associated with the detector-based spectral irradiance scale realization is separated into parts. Since the a... Open at page → 28 Page 28 19 from the performance of the InGaAs detector near its bandgap wavelength. In line 7, a substantial contribution to the total uncertainty comes from the uncertainty in the absolute wavelength, especially in the ultravio... Open at page → 29 Page 29 20 To determine whether the uncertainties have been correctly determined, data from separate independent scale realizations of an FEL lamp (F210) were analyzed. Figure 11 shows the percent differences from the mean in th... Open at page → 30 Page 30 21 the expanded uncertainties stated by the respective NMI. The detailed results of the comparison can be seen in Ref. 29. The differences of the NIST measurements from the KCRV were all within the expanded NIST uncertai... Open at page → 31 Page 31 22 Table 5. Uncertainty Budget for Spectral Irradi ance Calibrations Using FASCAL 2. Relative Expanded Uncertainties (k = 2) [%] S ource of Uncertainty 250 nm 350 nm 450 nm 555 nm 654.6 nm 900 nm 1600 nm 2000 nm 2300 nm... Open at page → 32 Page 32 23 5. Future Work The development of FASCAL 2, a dedicated spectral irradiance realization and calibration facility, and the implementation of the detector-based spectral irradiance scale have lead to lower total uncerta... Open at page → 33 Page 33 24 *Certain commercial equipment, instruments, or materials are identified in this paper to foster understanding. Such identification does not imply recommendation or endorsement by the National Institute of Standards an... Open at page → 34 Page 34 25 T15T. M. Suzuki and N. Ooba, Metrologia 12, 123 (1976). T16T. J.H. Walker, R.D. Saunders, J.K. Jackson, and K.D. Mielenz, J. Res. Natl. Inst. Stand. Technol. 96, 647-668 (1991). T17T. H.W. Yoon, C.E. Gibson, P.Y. Barn... Open at page → 35 Page 35 26 T30T. http://kcdb.bipm.org/ T31T. S.W. Brown, G.P. Eppeldauer, K.R. Lykke, NIST Facility for Spectral Irradiance and Radiance Responsivity Calibrations with Uniform Sources, Metrologia 37, 579-582 (2000). Open at page → 36 Page 36 Appendix A. Lamp Selection Process Before the FEL lamps are selected as spectral irradiance standards, the lamps are put through an aging and screening processes. Since lamps will typically become more stable with operat... Open at page → 37 Page 37 differences are within the uncertainties of the wavelength setting of the spectroradiometer. The aluminum is attributed to contamination of the tungsten filament during the manufacturing process. The high operational tem... Open at page → 38 Page 38 voltage fluctuates leading to a fluctuation in the optical output. The lamp seems to recover after 24 hours. 1.0100 0.9960 1.0000 1.0050 Current Voltage Monitor Monitoring Data Figure A3. The optical power and... Open at page → 39 Page 39 screening, FEL lamps must not exhibit more than 1 % change in the spectral irradiance at 654.6 nm as measured with the integrating sphere in place with a ± 1.0° rotation in any direction. Currently, about 95 % of the lam... Open at page → 40 Page 40 Appendix B. Orientation dependence of the FEL lamps Due to the electrical heating induced by the close to ~ 1000 W of electrical power dissipated by the FEL lamps, the lamp filament and the envelope are at high operating... Open at page → 41 Page 41 The lamp and the filter radiometer were placed to have the FEL in the vertical geometry. The initial signals from the filter radiometer was measured and recorded for comparisons with the later measurements. The lamp was... Open at page → 42 Page 42 Appendix C. Physical alignment of the FEL lamp This section describes the mounting and the alignment procedure for the NIST FEL lamps. The FEL lamps from the manufacturers are mounted into brass adapters which are in tur... Open at page → 43 Page 43 stray light since the integrating sphere receiver is sensitive to a wide-angular field of view. A third, rear-base baffle is used to cover the slightly reflective base of the FEL lamp from the receiver. The height of the... Open at page → 44 Page 44 D1 Appendix D. Atmospheric absorption and FEL interpolations D1. Atmospheric absorption Currently, the spectral irradiance scale is realized on FEL lamps at 35 separate wavelengths from 250 nm to 2400 nm. In the ultravio... Open at page → 45 Page 45 D2 D2. FEL interpolations FEL lamps are used in photometry to determine correlated color temperatures and distribution temperatures. The lamps are also sometimes used to realize other photometric units such as the lumen.... Open at page → 46 Page 46 D3 T 3 T. Ftirrad.vbp (program provided by NIST for polynomial or cubic-spline fitting of spectral irradiances) T 4 T. L.K. Huang, R.P. Cebulla and E. Hilsenrath, New Procedure for interpolating NIST FEL lamp irradiances... Open at page → 47 Page 47 E1 Appendix E. Sample calibration report REPORT OF CALIBRATION 39045C Spectral Irradiance Standard, 1000 W Tungsten Quartz-Halogen Lamp (250 nm to 2400 nm) for Osram Sylvania, Model # T6, Serial # F-000 Issued to: Radiom... Open at page → 48 Page 48 E2 REPORT OF CALIBRATION Manufacturer: Osram Sylvania 39045C Spectral Irradiance Standard, 1000 W Quartz-Halogen Lamp Model #: T6 Radiometric Systems Incorporated Serial #: F-000 2. Description of Calibration The lamp wa... Open at page → 49 Page 49 E3 REPORT OF CALIBRATION Manufacturer: Osram Sylvania 39045C Spectral Irradiance Standard, 1000 W Quartz-Halogen Lamp Model #: T6 Radiometric Systems Incorporated Serial #: F-000 4. General Information To maintain the hi... Open at page → 50 Page 50 E4 REPORT OF CALIBRATION Manufacturer: Osram Sylvania 39045C Spectral Irradiance Standard, 1000 W Quartz-Halogen Lamp Model #: T6 Radiometric Systems Incorporated Serial #: F-000 Table 1. Spectral Irradiance at 50 cm Lam... Open at page → 51 Page 51 E5 REPORT OF CALIBRATION Manufacturer: Osram Sylvania 39045C Spectral Irradiance Standard, 1000 W Quartz-Halogen Lamp Model #: T6 Radiometric Systems Incorporated Serial #: F-000 Figure 1. Calibration results of 1000 W Q... Open at page → 52 Page 52 E6 REPORT OF CALIBRATION Manufacturer: Osram Sylvania 39045C Spectral Irradiance Sta ndard, 1000 W Quartz-Halogen Lamp Model #: T6 Radiometric Systems Incorporated Serial #: F-000 Table 2. 2000 Spectral Irradiance Scale... Open at page → 53 Page 53 F1 Appendix F. Irradiance Calibration Procedures Manual Irradiance Calibration Procedures Manual 9 cm View half way down base Baffle Integrating sphere Lamp Open at page → 54 Page 54 F2 Irradiance Calibration Procedure IRR-CP-TOC-Table of Contents Table of Contents 0. Safety Precautions (IRR-CP-IRR0) 1. FASCAL2 Data Acquisition (DAQ) Program Operation (IRR-CP-IRR1) 2. Quartz Halogen Lamp (QHL) Alignm... Open at page → 55 Page 55 F3 Irradiance Calibration Procedure IRR-CP-IRR0-Safety Precautions Safety Precautions Safety glasses are required in the lab depending on task performed. The following hazards have been identified in this lab. Safety mea... Open at page → 56 Page 56 F4 Irradiance Calibration Procedure IRR-CP-IRR0-Safety Precautions UV Avoid skin and eye exposure Can burn skin and eyes Symbols, similar to the one below, are used throughout this document to alert the operator to poten... Open at page → 57 Page 57 F5 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation FASCAL2 Data Acquisition (DAQ) Program Operation 1. DAQ program (FEL Transfer.vi) 1.1. The DAQ program communicates with the Lamp... Open at page → 58 Page 58 F6 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation 2.3. The DAQ program runs the lamp scan program three times to cover the entire calibration range. Each run creates one raw data... Open at page → 59 Page 59 F7 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation 2.7. Select the Lamp Station 2.8. Enter the Lamp S/N 2.9. Select the Detector 2.10. Run the program 3. Motion control program (Mo... Open at page → 60 Page 60 F8 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation 3.2.4.2. Lamp 2 3.2.4.2.1. Open 3.2.4.2.2. Close 3.2.4.3. Lamp 3 3.2.4.3.1. Open 3.2.4.3.2. Close 3.2.4.4. Lamp 4 3.2.4.4.1. Open... Open at page → 61 Page 61 F9 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation 3.2.5.4.6. 6 4. Lamp stability program (FEL Stability.vi) 4.1. The lamp stability program measures selected lamps periodically (u... Open at page → 62 Page 62 F10 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.1. Front panel of FEL Transfer.vi Procedure Version Date Author Pages Filename IRR-CP-IRR1 1.0 29-Jun-06 C. Gibson 6... Open at page → 63 Page 63 F11 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.2. Front panel of Lamp Scan.vi Procedure Version Date Author Pages Filename IRR-CP-IRR1 1.0 29-Jun-06 C. Gibson 7 of... Open at page → 64 Page 64 F12 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.3. Sample raw data from lamp scan program Procedure Version Date Author Pages Filename IRR-CP-IRR1 1.0 29-Jun-06 C.... Open at page → 65 Page 65 F13 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.4. Sample formatted data from lamp scan program Procedure Version Date Author Pages Filename IRR-CP-IRR1 1.0 29-Jun-... Open at page → 66 Page 66 F14 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.5. Sample combined formatted data from DAQ program. The three formatted data files from the lamp scan program are co... Open at page → 67 Page 67 F15 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.6. Front panel of MotionMenu.vi Procedure Version Date Author Pages Filename IRR-CP-IRR1 1.0 29-Jun-06 C. Gibson 11... Open at page → 68 Page 68 F16 Irradiance Calibration Procedure IRR-CP-IRR1-FASCAL2 Data Acquisition Program Operation Figure Irr1.7. Front panel of FEL Stability.vi Procedure Version Date Author Pages Filename IRR-CP-IRR1 1.0 29-Jun-06 C. Gibson... Open at page → 69 Page 69 F17 Irradiance Calibration Procedure IRR-CP-IRR2-Quartz Halogen Lamp Alignment Quartz Halogen Lamp (QHL) Alignment BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. The spectral irradiance is measured at 50 cm from the recei... Open at page → 70 Page 70 F18 Irradiance Calibration Procedure IRR-CP-IRR2-Quartz Halogen Lamp Alignment 5.2. Turn on the lamp 5.3. Move the main table to lamp station 4 5.4. Use the scope to view the image of the integrating sphere exit port on... Open at page → 71 Page 71 F19 Irradiance Calibration Procedure IRR-CP-IRR2-Quartz Halogen Lamp Alignment 6.22. Put in integrating sphere 6.23. Use the distance gauge to measure 50 cm from the aperture of the integrating sphere to the front surfac... Open at page → 72 Page 72 F20 Irradiance Calibration Procedure IRR-CP-IRR2-Quartz Halogen Lamp Alignment Figure Irr2. This drawing shows the target area viewed by the spectroradiometer integrating sphere. Procedure Version Date Author Pages Filen... Open at page → 73 Page 73 F21 Irradiance Calibration Procedure IRR-CP-IRR3-Quartz Halogen Lamp Operation Quartz Halogen Lamp (QHL) Operation BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. Operating conditions 1.1. The lamp is slowly ramped up to 8... Open at page → 74 Page 74 F22 Irradiance Calibration Procedure IRR-CP-IRR3-Quartz Halogen Lamp Operation 9.3.2. From Windows Explorer 9.3.2.1.Locate Lamp Current Control.vi and double click to open 9.3.3. From LabVIEW 9.3.3.1.Open LabVIEW 9.3.3.2... Open at page → 75 Page 75 F23 Irradiance Calibration Procedure IRR-CP-IRR3-Quartz Halogen Lamp Operation 14. MANUAL RESET AFTER ERROR 14.1. Reset power supply if Yellow LED is lit 14.2. Turn off the power supply 14.3. Turn on the power supply 14.... Open at page → 76 Page 76 F24 Irradiance Calibration Procedure IRR-CP-IRR3-Quartz Halogen Lamp Operation Figure Irr3.1. Front panel of Lamp Current Control.vi Procedure Version Date Author Pages Filename IRR-CP-IRR3 1.0 27-Jun-06 C. Gibson 4 of 6... Open at page → 77 Page 77 F25 Irradiance Calibration Procedure IRR-CP-IRR3-Quartz Halogen Lamp Operation Figure Irr3.2. Sample lamp summary file Procedure Version Date Author Pages Filename IRR-CP-IRR3 1.0 27-Jun-06 C. Gibson 5 of 6 IRR-CP-IRR3 Q... Open at page → 78 Page 78 F26 Irradiance Calibration Procedure IRR-CP-IRR3-Quartz Halogen Lamp Operation Figure Irr3.3. Sample lamp time file Procedure Version Date Author Pages Filename IRR-CP-IRR3 1.0 27-Jun-06 C. Gibson 6 of 6 IRR-CP-IRR3 Quar... Open at page → 79 Page 79 F27 Irradiance Calibration Procedure IRR-CP-IRR4-High Temperature Blackbody (HTBB) Alignment High Temperature Blackbody (HTBB) Alignment BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. Run the motion control program (see I... Open at page → 80 Page 80 F28 Irradiance Calibration Procedure IRR-CP-IRR4-High Temperature Blackbody (HTBB) Alignment 4. Align the water-cooled aperture (WCA) 4.1. Use double stick tape to attach a microscope slide to the HTBB water-cooled apert... Open at page → 81 Page 81 F29 Irradiance Calibration Procedure IRR-CP-IRR4-High Temperature Blackbody (HTBB) Alignment Figure Irr4. This drawing shows the optical layout for the HTBB alignment Procedure Version Date Author Pages Filename IRR-CP-I... Open at page → 82 Page 82 F30 Irradiance Calibration Procedure IRR-CP-IRR5-High Temperature Blackbody (HTBB) Operation High Temperature Blackbody (HTBB) Operation BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. HTBB Preparation 1.1. Turn on the arg... Open at page → 83 Page 83 F31 Irradiance Calibration Procedure IRR-CP-IRR5-High Temperature Blackbody (HTBB) Operation 2.3. Power supply specifications 2.3.1. Input: 480 VAC, 3 Phase, 4 wire, Wye, 60 Hz, 27 kVA 2.3.2. Output: 600 A at 30 VDC 2.3.... Open at page → 84 Page 84 F32 Irradiance Calibration Procedure IRR-CP-IRR5-High Temperature Blackbody (HTBB) Operation 3.4. The HTBB control program starts in the current control mode and ramps the HTBB from room temperature to 1700 ºC by ramping... Open at page → 85 Page 85 F33 Irradiance Calibration Procedure IRR-CP-IRR5-High Temperature Blackbody (HTBB) Operation 4.8. Turn off cold water to the HTBB aperture 4.9. Turn off chilled water to the power supply 4.10. Install vacuum plate and ca... Open at page → 86 Page 86 F34 Irradiance Calibration Procedure IRR-CP-IRR5-High Temperature Blackbody (HTBB) Operation Figure Irr5.1. Front panel of the Digital Multimeter Feedback Program (22_hp3457_feedback.vi) Procedure Version Date Author Pag... Open at page → 87 Page 87 F35 Irradiance Calibration Procedure IRR-CP-IRR5-High Temperature Blackbody (HTBB) Operation Figure Irr5.2. Front panel of the HTBB Control Program (BB3200_(main.exe).vi) Procedure Version Date Author Pages Filename IRR-... Open at page → 88 Page 88 F36 Irradiance Calibration Procedure IRR-CP-IRR6-Filter Radiometer (FR) Alignment Filter Radiometer (FR) Alignment BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. Run the motion control program (see IRR-CP-IRR1) 2. Align t... Open at page → 89 Page 89 F37 Irradiance Calibration Procedure IRR-CP-IRR6-Filter Radiometer (FR) Alignment Figure Irr6. This drawing shows the optical layout for the HTBB and FR alignment Procedure Version Date Author Pages Filename IRR-CP-IRR6... Open at page → 90 Page 90 F38 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Spectral Irradiance Scale Realization BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. Run the motion control program (see IRR-CP-IRR1)... Open at page → 91 Page 91 F39 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization 6.3.5.2. Measure once 6.3.6. Click the Save config. button 6.3.7. Enter the 3457A digital multimeter data 6.3.7.1. Click the Read Onc... Open at page → 92 Page 92 F40 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization 10.3. Step 1: Load the FR parameter file 10.3.1. Select the FR button 10.3.2. Click the Load FR values button 10.4. Step 2: Calculate... Open at page → 93 Page 93 F41 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization 12. Document History Version Version Date Author Page Total Revision Date Revision Date Revision Date Revision Date 1.0 20-Sep-06 C.... Open at page → 94 Page 94 F42 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.2. Sample measurement data for Filter Radiometer #2 Procedure Version Date Author Pages Filename IRR-CP-IRR7 1.0 20-Sep-0... Open at page → 95 Page 95 F43 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.3. Front panel of the calculate FR net signals program (FRSigCalc.frm) Procedure Version Date Author Pages Filename IRR-C... Open at page → 96 Page 96 F44 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.4. Front panel of the calculate HTBB temperature and irradiance program (FRTCalc.frm) Procedure Version Date Author Pages... Open at page → 97 Page 97 F45 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.5. Sample FR parameter file used by the calculate HTBB temperature and irradiance program (FRTCalc.frm) Procedure Version... Open at page → 98 Page 98 F46 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.6. Sample power responsivity data for Filter Radiometer #2 used by the calculate HTBB temperature and irradiance program... Open at page → 99 Page 99 F47 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.7. Sample temperature data Filter Radiometers #2, #3, and #4 which is the output from the calculate HTBB temperature and... Open at page → 100 Page 100 F48 Irradiance Calibration Procedure IRR-CP-IRR7-Spectral Irradiance Scale Realization Figure Irr7.8. Sample HTBB spectral irradiance data calculated from calculate HTBB temperature and irradiance program (FRTCalc.frm) P... Open at page → 101 Page 101 F49 Irradiance Calibration Procedure IRR-CP-IRR8-Spectral Irradiance Calibration Spectral Irradiance Calibration BRIGHT SOURCE BURN COLLISION ELECTROCUTION 1. Align the lamps (See IRR-CP-IRR2) 2. Run the Lamp Current Con... Open at page → 102 Page 102 F50 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Spectral Irradiance Data Reduction 1. Calculate the calibration factor (CF) 1.1. Open the primary working standards (PWS) irradiance spr... Open at page → 103 Page 103 F51 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction 2.3. Edit test irradiance spreadsheet 2.3.1. Enter new spreadsheet name 2.3.2. Enter current date 2.3.3. Edit chart titles 2.3.4. Copy M... Open at page → 104 Page 104 F52 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.1. Primary working standard spreadsheet with spectral irradiance values in W cm -3 . The wavelength is in nm. Procedure Vers... Open at page → 105 Page 105 F53 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.2. Sample signal file. The first column is wavelength in nm. The second column is the net signal in V. The last column is th... Open at page → 106 Page 106 F54 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.3. Left side of sample calibration spreadsheet Procedure Version Date Author Pages Filename IRR-CP-IRR9 1.0 28-Jun-06 C. Gib... Open at page → 107 Page 107 F55 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.4. Right side of sample calibration spreadsheet Procedure Version Date Author Pages Filename IRR-CP-IRR9 1.0 28-Jun-06 C. Gi... Open at page → 108 Page 108 F56 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.5. Left side of sample test irradiance spreadsheet Procedure Version Date Author Pages Filename IRR-CP-IRR9 1.0 28-Jun-06 C.... Open at page → 109 Page 109 F57 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.6. Right side of sample test irradiance spreadsheet Procedure Version Date Author Pages Filename IRR-CP-IRR9 1.0 28-Jun-06 C... Open at page → 110 Page 110 F58 Irradiance Calibration Procedure IRR-CP-IRR9-Spectral Irradiance Data Reduction Figure Irr9.7. Final data worksheet of sample test irradiance spreadsheet Procedure Version Date Author Pages Filename IRR-CP-IRR9 1.0 2... Open at page → 111 Page 111 F59 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Calculate the Correlated Color Temperature (CCT) and Luminous I... Open at page → 112 Page 112 F60 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data 1.4. Blackbody fit program (Part 2 Compute irradiance) (Calcirr... Open at page → 113 Page 113 F61 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data 2.5. Select file to reduce 2.5.1. Enter Input File 2.5.1.1. Sel... Open at page → 114 Page 114 F62 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Figure Irr10.1. Front panel of Fitdata.frm Procedure Version Da... Open at page → 115 Page 115 F63 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Figure Irr10.2. Front panel of Calcirr.frm Procedure Version Da... Open at page → 116 Page 116 F64 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Figure Irr10.3. Sample fit coefficients from data interpolation... Open at page → 117 Page 117 F65 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Figure Irr10.4. Sample spectral irradiance data from blackbody... Open at page → 118 Page 118 F66 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Figure Irr10.5. Front panel of Photomet.frm Procedure Version D... Open at page → 119 Page 119 F67 Irradiance Calibration Procedure IRR-CP-IRR10-Calculate the Correlated Color Temperature (CCT) and Luminous Intensity (LI) from Spectral Irradiance Data Figure Irr10.6. Sample correlated color temperature and luminou... Open at page → 120 Page 120 F68 Irradiance Calibration Procedure IRR-CP-IRR11-Reset Linear Encoder Reset Linear Encoder 1. The Linear Encoder requires resetting when the Reference Mark is lost. 2. When the HEIDENHAIN display unit is powered on, the... Open at page → 121 Page 121 F69 Irradiance Calibration Procedure IRR-CP-IRR11-Reset Linear Encoder Figure IRR11.1 Front panel of HEIDENHAIN Linear Encoder Display Unit Figure IRR11.2 Front panel of UNIDEX 511 Motion Controller Procedure Version Dat... Open at page → 122 Page 122 F70 Irradiance Calibration Procedure IRR-CP-IRR12-Goniometric Scan Goniometric scan LASER COLLISION 1. The quartz halogen lamp (QHL) is spatially mapped by rotating the about the vertical and horizontal axes. This method... Open at page → 123 Page 123 F71 Irradiance Calibration Procedure IRR-CP-IRR12-Goniometric Scan 10. Center the pointer about the horizontal axis 10.1. Rotate the pointer +7°about the horizontal axis 10.2. Look through the scope 10.3. Rotate back to... Open at page → 124 Page 124 F72 Irradiance Calibration Procedure IRR-CP-IRR12-Goniometric Scan 11.12. Mark the starting position of the gonio stage horizontal dial with a piece of masking tape 11.13. Connect motor cables 11.14. Turn on Aerotech con... Open at page → 125 Page 125 F73 Irradiance Calibration Procedure IRR-CP-IRR12-Goniometric Scan 16. Document History Version Version Date Author Page Total Revision Date Revision Date Revision Date Revision Date 1.0 30-Jun-06 C. Gibson 5 Figure IRR1... Open at page → 126 Page 126 F74 Irradiance Calibration Procedure IRR-CP-IRR12-Goniometric Scan Figure IRR12.2. Sample goniometric scan data Procedure Version Date Author Pages Filename IRR-CP-IRR12 1.0 30-Jun-06 C. Gibson 5 of 5 IRR-CP-IRR12 Goniom... Open at page → 127 Page 127 G1 Appendix G. Radiation constants c = speed of light in vacuum c1L = first radiation constant for spectral radiance = 2 h c 2 c2 = second radiation constant = h c k -1 h = Planck constant = 6.626 069 57 (29) × 10 -34 J... Open at page → 128 Page 128 H1 Appendix H. Conversion factors Spectral radiance Spectral irradiance To convert from cm -2 cm -1 multiply by Area in m 2 , wavelength in m W m -2 m -1 sr -1 W m -2 m -1 10 6 Area in m 2 , wavelength in cm W m -2 cm -1... Open at page → 129 Page 129 I1 Appendix I. Alignment jig Figure I1. Dimensional drawing of alignment jig 1.9 Front view Side view 9.5 4.8 2.25 0.64 1.9 2.05 2.22 8.41 All dimensions in cm Flat glass plate parallel to plane of both rods Epoxy encaps... Open at page → 130 Page 130 J1 Appendix J. Kinematic lamp socket Open at page → 131 Page 131 K1 Appendix K. Calibration data points Spectral irradiance is measured at the following wavelengths Wavelength [nm] Wavelength [nm] 250 555 260 600 270 654.6 280 700 290 800 300 900 310 1050 320 1150 330 1200 340 1300 35... Open at page → 132 Page 132 L1 Appendix L. Calibration services The Spectroradiometric Sources Calibration services include the following. Service ID Number Description of Services NIST calibrates and issues a 1000 W, tungsten quartz-halogen lamp m... Open at page →