# US 8,740,168 B2 · Cryogenically cooled detector pin mount

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- Number: US 8,740,168 B2
- Document ID: US8740168B2
- Status: Granted
- Kind: B2
- Application number: 13/046,924
- Filed: 2011-03-14
- Published: 2012-09-20
- Granted: 2014-06-03
- Earliest claimed: 2011-03-14
- Assignees: Lawrence Livermore National Security, LLC
- Applicants: William E. Hunt, Jr.; Michael P. Chrisp
- Inventors: William E. Hunt, Jr.; Michael P. Chrisp
- Web page: https://patentgrep.com/patent/US8740168B2

## CPC

- G01J 3/0202: {Mechanical elements; Supports for optical elements}
- G01J 3/0286: {Constructional arrangements for compensating for fluctuations caused by temperature, humidity or pressure, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a spectrometer, e.g. vacuum}
- G01J 3/2803: {using photoelectric array detector}
- G01J 3/36: Investigating two or more bands of a spectrum by separate detectors
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

A focal plane assembly facilitates a molybdenum base plate being mounted to another plate made from aluminum. The molybdenum pin is an interference fit (press fit) in the aluminum base plate. An annular cut out area in the base plate forms two annular flexures.

## Claims

### Claim 1

A wide-swath imaging spectrometer with a cryogenically cooled detector pin mount for pushbroom imaging, consisting of:
a first wide-swath imaging spectrometer module with a first entrance slit,
a second wide-swath imaging spectrometer module with a second entrance slit wherein said first entrance slit and said second entrance slit overlap during pushbroom imaging,
both said first wide-swath imaging spectrometer module and said second wide-swath imaging spectrometer module including
a camera/detector system,
a camera/detector system centerline,
a focal plane assembly on said camera/detector system centerline,
a cryogenically cooled detector in said focal plane assembly,
a molybdenum metal base plate connected to said cryogenically cooled detector,
a molybdenum metal pin projecting from said cryogenically cooled detector molybdenum metal base plate,
an aluminum metal base plate, and
a hole in said aluminum metal base plate wherein said aluminum metal base plate is connected to said molybdenum metal pin by an interference fit between said molybdenum metal pin and said hole in said aluminum metal base plate, wherein said molybdenum metal pin and said aluminum metal base plate have different thermal expansion rates because they are made of different metals.