66 -- REFLECTORLESS ABSOLUTE DISTANCE METER

Notice Date

July 9, 2001

Contracting Office

NASA/George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812

ZIP Code

35812

Solicitation Number

8-1-1-S7-D4857

Response Due

July 24, 2001

Point of Contact

Bobby J. Holden, Contract Specialist, Phone (256) 544-5417, Fax (256) 544-9354, Email Bobby.Holden@msfc.nasa.gov -- Warren G. Jones Jr., Contracting Officer, Phone (256) 544-0389, Fax (256) 544-9354, Email warren.jones@msfc.nasa.gov

E-Mail Address

Bobby J. Holden (Bobby.Holden@msfc.nasa.gov)

Description

NASA/MSFC plans to issue a Request for Quotation (RFQ) for a Reflectorless Absolute Distance Meter. The requirements for the Reflector-less Absolute Distance Meter (ADM) are as follows: Non-contact, absolute distance measurement device for measuring radius of curvature for large mirrors. Next Generation Space Telescope (NGST's) Advanced Mirror System Demonstrator (AMSD) cryogenic optical test program is planning to purchase an absolute distance meter (ADM) for measuring radius of curvature for mirrors with long radius of curvature with high absolute accuracy without using retro-reflectors on or near the mirror surface. However, a retro-reflector can be placed near the ADM for double pass measurement. The ADM shall be used for measuring the absolute radius of curvature for mirrors with 10 to 50 meters radius of curvature as the mirror thermal cycle from ambient temperature and pressure to 25 deg. Kelvin and high vacuum and back to ambient condition. The ADM shall be placed at or near the mirror's radius of curvature for the measurements and the ADM shall be housed in an ambient environment. A 15.9 mm thick BK7 vacuum chamber window is located approximately 0.4 meter in front of the ADM. The ADM shall have a continuous measurement range from 1.5 meter to 50 meters with absolute accuracy of +/- 100 microns or better with high reproducibility. The ADM shall be used for measuring precise change in radius of curvature of lightweight mirrors for the Next Generation Space Telescope program. The AMSD mirrors are off-axis parabolic mirrors with 10 meters radius of curvature with 1.4 meters in size. The mirrors are made of Beryllium and glass ceramic. These mirrors shall be tested in cryogenic and vacuum environment at the X-Ray Calibration Facility (XRCF) at NASA/Marshall Space Flight Center. This vacuum chamber has a 15.9 mm thick BK7 optical window for measuring the mirror under test. The ADM shall be one of several optical instruments mounted onto an interferometer palette for measuring the characteristics of the mirror inside the test chamber. During each test with duration of several weeks, there may not be a continuous line of sight to the mirror due to a thermal shutter placed between the mirror and the ADM, therefore a distance measurement interferometer shall not be feasible for the measurement once the thermal shutter is in the optical path. The thermal shutter shall be closed during period with no optical measurements in order to increase cooling rate. Most of the laser trackers require mounting a retro-reflector or corner cube on the telescope mirror surface to be tested. Mounting a retro-reflector on mirror surface may permanently damage the optical surface. The exact location of the retro-reflector on the mirror may be an unknown as the mirror cools from ambient temperature to 25 degrees Kelvin. The retro-reflector may not survive in cryogenic temperature. The ADM is a custom build item made specifically to meet our requirement. Technical requirements: Principle of operation: light polarization modulation Measurement range: continuous from 1.5 to 50 meters Measurement accuracy: +/- 100 microns or better w/o retro Retro-reflector: none Target laser: visible, ~5 mm dia. at 10 meters ADM laser: 780 nm Dimension of ADM: 40 x 12 x 4 cm (L x H x T) Weight of ADM: less than 2 kg Power supply for ADM: 15 volt 2 Amp DC Mechanical interface: TBD Rate of measurement: 1 within 2 seconds Computer: Portable laptop Processor: Pentium III, 850MHz or faster Memory: 128MB or greater Hard Drive: 18 GB or larger Screen size: 14 inches or greater Operating system: Windows NT or 2000 Data cable length between 8 meters or greater ADM and computer: ADM user manual: English Software interface: English Measurement mode: single or multiple Measurement mode: continuous or interval Delivery August 2001 or earlier Acceptance testing and 3 days training at MSFC This procurement is being conducted under the Simplified Acquisition Procedures (SAP). NASA/MSFC intends to purchase the items from Leica Geosystems, Inc. The Government intends to acquire a commercial item using FAR Part 12. Interested organizations may submit their capabilities and qualifications to perform the effort in writing to the identified point of contact not later than 4:30 p.m. local time on July 18, 2001 Such capabilities/qualifications will be evaluated solely for the purpose of determining whether or not to conduct this procurement on a competitive basis. A determination by the Government not to compete this proposed effort on a full and open competition basis, based upon responses to this notice is solely within the discretion of the government. Oral communications are not acceptable in response to this notice. All responsible sources may submit an offer which shall be considered by the agency. An Ombudsman has been appointed. See NASA Specific Note "B". Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nasanote.html

Web Link

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Record

Loren Data Corp. 20010711/66SOL005.HTM (D-190 SN50R1K9)