AFMETCAL Det 1/MLK, 813 Irving-Wick Dr W, Suite 4M, Heath, OH 43056-6116

66 -- PHOTOMETRIC CALIBRATION SYSTEM SOL F33660-99-R7007 DUE 041499 POC Buyer: Janet Casler, 740-788-5041, Contracting Officer: Glenna Pound, 740-788-5043 The Air Force Metrology and Calibration (AFMETCAL) program requires 5 each Photometric Calibration Systems in accordance with Directorate of Metrology Purchase Description PD99MLEEJG1-1, dated 11 Dec 98. Requirement includes a 5 year worldwide warranty and data with each unit and an Option for 0-5 each in FY00. General Description: The iphotometric calibration system is a system of light sources and detectors for calibrating a wide variety of luminance and illuminance meters. The system may be comprised of a source for luminance and a separate source for illuminance, or they may be combined into one source with accessories to produce fields of light for calibrating luminance and illuminance meters. The power supplies and controllers may also be combined into one unit or may be separate items for the luminance and illuminance sources. The photometric calibration system shall include standard detectors to be used to transfer calibration from the Air Force Primary Standards Laboratory to the precision measurement equipment laboratories. The luminance source shall be a sphere type source to provide a uniform field of light at the output port for calibration of luminance meters. The diameter of the output port shall be from three to four inches. The color temperature of the luminance source shall be Illuminant A (2856K  50K) and shall be adjustable to 3100K. The spectral output of the source must be planckian in nature over the range of 350 to 800 nm with no dips or spikes in the wavelength spectrum. The luminance produced shall be from 0 to 20,000 fL (footlamberts) (68,000 candela/square meter) when the color temperature is set to 2856K. The luminance levels shall be adjustable over the full luminance range to be able to set at least four luminance levels in each decade over the range of 10 to 20,000 fL. The color temperature shall remain constant when setting luminance levels. The luminance levels shall not be set by changing the lamp current or temperature settings. However, the controller may adjust the lamp current to maintain a constant luminance value while maintaining the color temperature within + or -- 50K of 2856K. The luminance shall be uniform to better than + or -- 2% across the diameter of the output port. The output port shall have a frame capable of mounting various attachments such as opal glass diffusers, color filters, and detector holders. The luminance output level shall be controlled by utilizing a photopically corrected detector mounted on the sphere wall to stabilize the luminance levels to + or -- 0.5% or better. The responsivity of the detector shall not change as the sphere warms up when heated by the lamps. The illuminance source shall provide a collimated field of uniform light for calibration of illuminance meters. The collimated output of the illuminance source shall give a spot of at least two inches diameter where the illuminance is uniform to better than + or -- 2%. The color temperature of the illuminance source shall be Illuminant A (2856K + or -- 50K)and shall be adjustable to 3100K. The spectral output of the source shall be planckian in nature over the range of 350 to 800 nm with no dips or spikes in the wavelength spectrum. The illuminance levels shall be from 0 to 2000 footcandles (fC) when the source color temperature is set to 2856K. The illuminance levels shall be adjustable over the full illuminance range to be able to set at least four illuminance levels in each decade over the range of 1 to 2,000 fC. The color temperature shall remain constant at all illuminance levels. The illuminance levels shall not be adjusted by changing the lamp current or temperature settings. However, the controller may adjust the lamp current to maintain a constant luminance value while maintaining the color temperature within + or -- 50K of 2856K. The output optics system shall be capable of inserting attenuation and color filters. The output beam shall be collimated such that the effective photometric distance from the lens shall appear to be offset by two meters or more when the illuminance meters are set in the position of the highest illuminance levels. The calibration system shall include a standard detector for luminance and illuminance. The luminance detector shall be in addition to the luminance monitor detector mounted in the luminance sphere source. These standard detectors shall be used to transfer calibration from the Air Force Primary Standards Laboratory to the precision measurement equipment laboratories worldwide. The spectral response of the luminance detector shall match the V( ) photopic spectral response curve with a value of F1' of 2% or less, as calculated according to CIE publication No. 69 (1987). The luminance detector shall have a field of view of 3 degrees or less. The optics of the luminance detector shall focus on the exit port of the luminance source within the length of the included rail system. The entrance aperture diameter of the luminance meter shall not be larger than 1.5 inches. The detector shall be capable of being mounted along the optical axis of the luminance source. The illuminance detector shall have a response at 30 degrees incidence angle of within + or -- 2% of the ideal cosine response. The spectral response of the illuminance detector shall match the V( ) photopic spectral response curve with a value of F1' of 2% or less, as calculated according to CIE publication No. 69 (1987). The diameter of the sensitive area of the illuminance detector shall not be greater than one inch. The detector shall be capable of being mounted along the optical axis of the illuminance source. The redout unit for both the luminance and illuminance detectors shall be able to display the readings in either footcandles or lux (lumens per square meter) for illuminance and in either footlamberts or candela per square meter for luminance. The calibration system shall include all necessary power supplies, controllers, and mounting system to operate the light sources and perform calibrations with the luminance and illuminance detectors. The sphere source controller shall display a reading of the luminance value from the controller detector in units of footlamberts or candela per square meter. The units of the display shall be selectable by the user. The calibration of the luminance readout shall be adjustable in a manner that will permit recalibration of the luminance levels by comparison to a standard luminance meter. The controllers for all the sources shall turn on the lamps by slowly ramping up the current to prevent damage to the lamps by thermal shock. Both the luminance and illuminance sources shall include a rail and holder system that can be used to read the distance from the source to the standard and test instrument detectors and keep the center of the light field centered on the standard and test meters. The rail shall not be longer than 1.5 meters. The input power requirements are: 120 Vrms +/- 10%, 50 to 60 Hz. Instrument shall include a power cord with a minimum length of 6 feet. The mechanical and physical requirements are as follows: Commercial parts and materials that are used shall have properties consistent with a precision laboratory instrument. The equipment shall be designed and constructed of materials that meet the requirements of this specification and in accordance with the best commercial practices for industry approved equipment. It shall be designed and manufactured to maximize reliability, maintainability, accuracy of operation, and ease of operation. All parts such as shafts, bearings, regulators, switches, controls, etc., shall have proper clearance and adjustments. They shall work together so that the equipment will supply the rated requirements without unnecessary strains, vibrations, or overheating. They shall be able to withstand the conditions met in shipping, storage, installation, and service. All materials and parts of this equipment shall be capable of withstanding the environmental requirements of this specification. Electrical, electronic, and electromechanical items shall be capable of operating in an ambient temperature of 0 to 50 deg C without loss of required performance. All accessories necessary for normal operation of the equipment shall be supplied. The unit shall be assigned a model number designation by the contractor. Each individual unit shall be assigned a unique serial number designation by the contractor. A complete list of the performance/functional requirements is contained in the purchase description attached to the solicitation package. Solicitation Number: F33660-99-R7007. FOB Destination. Delivery to be a minimum of 3 each within 180 calendar days after contract award and continue at a minimum rate of 3 each every 30 days thereafter until complete. All solicitation requests must be in writing. Written requests can be faxed to 740-788-5157. Oral requests will not be accepted. Request for proposal will be issued approx. 15 Mar 99. Closing date will be approx. 14 Apr 99. All responsible sources may submit a proposal, which shall be considered. Special note to all prospective offerors: DOD will not awardcontracts to contractors that have not registered in the Central Contractor Registration (CCR) data base. Registration may be done by assessing the CR via the Internet at http://ccr.edi.disa.mil or call the DOD electronic Commerce Information Center at 1-800-334-3414. Posted 02/23/99 (W-SN301237). (0054)

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