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  • 1
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    Optical design of zero-power Hubble Space Telescope wave-front correctors for null testing (1993)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: The optical design of the second-generation wide-field/planetary-camera instrument for the Hubble Space Telescope has been modified to compensate for the spherical aberration of the optical telescope assembly (OTA) by introduction of undercorrected spherical aberration into the wave front. This instrument can be tested in a simple manner to ensure that its aberration contribution has the proper sign and magnitude. We present designs for a near-zero power doublet lens that can be used to generate a spherically aberrated wave front that is similar to the OTA wave front. When this lens is used in combination with the instrument, a near-perfect or nulled wave front should be produced, resulting in a high-quality point image on axis. We also present lens designs for a similar test that can be performed on the OTA simulators now being built to verify the other second-generation instruments.
    Keywords: OPTICS
    Type: Applied Optics (ISSN 0003-6935); 32; 10; p. 1782-1785.
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Telescope simulators for Hubble - An overview of optical designs (1993)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: This paper briefly describes optical design of the Hubble Space Telescope (HST) and overviews three optical design simulators for HST which have been proposed for use as verification tools to characterize the performance of second-generation instruments during ground testing. These simulators are: the Refractive Aberrated Simulator developed at Ball Aerospace, the Optical Simulator developed at Laboratoire Astronomie Spatiale, and the Jet Propulsion Laboratory Stimulus. Relative advantages and disadvantages of each optical configuration are discussed.
    Keywords: OPTICS
    Type: Applied Optics (ISSN 0003-6935); 32; 10; p. 1775-1781.
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Optical alignment and testing of the Diffuse IR Background Experiment IR cryogenic telescope (1989)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Diffuse Infrared Background Experiment (DIRBE) optical alignment and testing methods are discussed. Using strobe videography, vibration and performance testing of a 32 hz tuning-fork chopper was carried out. The Cosmic Background explorer satellite provides improved microwave and IR all-sky maps of the cosmic background radiation from a polar orbit. A liquid helium cryostat houses the DIRBE and the Far IR Absolute Spectrophotometer (FIRAS) instruments at a temperature of 2 K. Differential MicRowave Radiometers (DMRs) provide large scale maps of anisotropy of the 3 K background at wavelengths of 3.3, 5.7, and 9.6 mm. The DIRBE telescope is an IR photometric instrument with 10 wavelength bands between 1 and 300 microns, designed to measure radiation from the epoch of galaxy formation. Stringent stray light requirements mean that the DIRBE flight instrument has to be built and tested in a class 100 environment.
    Keywords: OPTICS
    Type: Cryogenic Optical Systems and Instruments III; Aug 17, 1988 - Aug 19, 1988; San Diego, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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