Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
Patent
1987-03-20
2000-12-26
Hellner, Mark
Optics: measuring and testing
Angle measuring or angular axial alignment
With photodetection remote from measured angle
G01B 1126
Patent
active
061668036
ABSTRACT:
A subsystem addition to the Imaging Simplified Laser Pointing System (ISL). The subsystem in itself is a laser system to be operated off-axis within the field of view of the ISLAPS. This subsystem laser is to be used to interrogate the target. Operation of the ISLAPS at night or with low light conditions is made possible by this addition. The interrogator beam is bounced off the target. In the OA mode the receiver is looking for a retro-reflection or optical augmentation to signal the firing of the negation laser. This mode can be used at any light level. In the illuminator mode the interrogator is "opened up" to effectively spotlight the target during low light conditions. This allows for imaging, aimpoint selection and video correlation in the same manner as was done with ambient light in the original system. The use of the interrogator also makes it possible to range gate. This reduces background creating clearer images and increases sensitivity because it allows for a reduction in threshold levels.
REFERENCES:
patent: 3902036 (1975-08-01), Zaleckas
patent: 4614913 (1986-09-01), Honeycutt et al.
Ayre Vernon H.
Dempsey John K.
Milton Richard D.
Otto William F.
Bush Freddie M.
Hellner Mark
The United States of America as represented by the Secretary of
Tischer Arthur H.
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