Optical Radiation Measurements Surface Color and Appearance Rate our Services Technical Contacts:
Maria E. Nadal (38090S and 38091S)
Tel: 301/9754632
Email: maria.nadal@nist.gov Martin Wilson (38100C-38130C)
Tel: 301/9752356
Email: martin.wilson@nist.gov Please contact the technical staff before shipping instruments or standards to the address listed below. Mailing Address:
National Institute of Standards and Technology
100 Bureau Drive, Stop 8442
Gaithersburg, MD 20899-8442
Fax: 301/840-8551 Letter to NIST customers about the conversion of SRM 1001 and SRM 1008 to calibrated artifacts. Service ID
Number | Description of Services | Fee ($) | | 38090S | Specular Gloss | At Cost | | 38091S | Special Test of 0°/45° Surface Color | At Cost | | 38100C | X-Ray Film Step Tablet Transmission Density Standard (Replacement for SRM 1001) | 1017 | | 38110C | Recalibration of an X-Ray Film Step Tablet Transmission Density Standard | 1473 | | 38120C | Photographic Film Step Tablet Transmission Density Standard (Replacement for SRM 1008) | 1244 | | 38130C | Recalibration of a Photographic Film Step Tablet Transmission Density Standard | 1676 | Fees are subject to change without notice. back to top | back to index of optical radiation measurements This laboratory's quality system is based on the ANSI/NCSL Z54011994 standard and the ISO/IEC Guide 25. Measurements of specular gloss of customersupplied test items can be performed for 20, 60, and 85 degree geometries according to the specifications given in ASTM D523 and ISO 2813. Arrangements for these measurements on submitted test items must be made before shipment. The decision to perform the measurements will rest with NIST, and test items not accepted for measurement will be returned. back to top | back to index of optical radiation measurements Measurements of 0°/45° surface color can be made at wavelengths from 360 nm to 800 nm at 5 nm increments for nonfluorescent submitted test items. Measurements of spectral reflectance factor are performed at room temperature with the incident beam normal to the front surface of the test item and the receiver at a viewing angle of 45°. Items with dimensions from 5.08 cm to 10.2 cm perpendicular to the incident beam are routinely accommodated. Other sizes and measurement conditions are possible in consultation with NIST staff. The customer specifies the illuminant(s), observer(s), and color space(s) for calculations of the surface color. Uncertainty estimates will be given and will depend on the optical characteristics of the submitted test item. Arrangements for these measurements on submitted test items must be made before shipment. The decision to perform the measurements will rest with NIST. Test items not accepted for measurement will be returned. back to top | back to index of optical radiation measurement A double emulsion X-ray film step tablet is provided with transmission densities measured for each step. The tablets are 25.4 cm long by 3.5 cm wide with 17, 1.3 cm wide steps along the tablet length. The transmission densities of the steps range from 0.2 to greater than 4.0 and are measured using the NIST Diffuse Transmittance Densitometer according to the conditions specified in the ISO Standard "Diffuse Visual Transmission Density, DT (90° Opal; SH: - 10°; VT). This step tablet is designed as a replacement for SRM 1001, X-Ray Film Step Tablet. back to top | back to index of optical radiation measurement A SRM 1001 or Calibration Service ID 38100C step tablet will be recalibrated for transmission density as described above for Service ID 38100C. NIST accepts the right to inspect the artifact for scratches, blemishes, or wear to ensure its suitability to serve as a transmission density standard. Rejected artifacts will be returned to the customer. back to top | back to index of optical radiation measurement A photographic silver density film step tablet is provided with transmission densities measured for each step. The tables are 25.4 cm long by 3.5 cm wide with 23, 1.0 cm wide steps along the tablet length. The transmission densities for the steps range from nominally 0.200 to 4.000. the transmission density of each step is measured using the NIST Diffuse Transmittance Densitometer according to the conditions specified for American National Standard Diffuse Visual Transmission Density, (90° Opal; SH: - 10°; VT). The step tablet is designed as a replacement for SRM 1008, Photo Step Tablet. back to top | back to index of optical radiation measurement A SRM 1008 or Calibration Service ID 38120C step tablet will be recalibrated for transmission density as described above for Service ID 38120C. NIST accepts the right to inspect the artifact for scratches, blemishes or wear to ensure its suitability to serve as a transmission density standard. Rejected artifacts will be returned to the customer. back to top | back to index of optical radiation measurements Date created: 06/30/1999
Last updated: 01/15/2009 | 