DETECTOR APPARATUS FOR DETECTING COHERENT MONOCHROMATIC POINT-SOURCE RADIATION
Assignee
FERRANTI PLC,
Filed
Feb 13, 1985
Granted
Aug 10, 1993
Location
EDINBURGH GB
Abstract
Detector apparatus includes a dispersive prism (10) and a diffraction grating (11) of the type which produces only zero and first order diffraction patterns. Located behind the diffraction grating (11) so as to interact with the first harmonic content of the diffraction patterns is a Moire grating (12) having half the pitch of the diffraction grating (11). Detector means including at least two pairs of detectors (13-16) is located behind the Moire grating (12) to detect the presence of Moire fringes.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 26, 1986
Rescinded
Jul 10, 1992
Duration
6 years, 3 months
Inventor
- 1HILLARY G. SILLITTO
Record Details
- Patent number
- US 5235405
- Application
- 06732634
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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