Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1992-09-16
1994-07-12
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
250213, 359211, 359389, 359425, 359426, G01C 308, H01J 3150, G02B 2106
Patent
active
053293479
ABSTRACT:
There is provided a multifunction coaxial objective system (16) for a laser rangefinder (10). The transmitter, receiver, and viewing optical systems have a common, coaxial optical axis (48). The multifunction coaxial objective system (16) includes lenses (28), (30) and mirror (32) each having a central obscuration therein. The multifunction coaxial objective system (16) further includes a lens (34) having a dichroic coating on one surface (50). The dichroic coated lens (34) transmits visible and near infrared light and reflects light of the wavelength transmitted by a laser emitter (18). The viewing optical system includes a pair of focusing wedges (42), (44) for adjusting the focus of the viewing optical system. Each focusing wedge (42), (44) is a wedge-shaped optical flat. The pair of focusing wedges (42), (44) are disposed against one another along a plane inclined with respect to the coaxial optical axis (48) of the multifunction coaxial objective system (16). Focus adjustment is achieved by relative movement between the focusing wedges (42), (44) along the inclined plane. The multifunction coaxial objective system (16) of the present invention may alternatively be incorporated into a rangefinder and camera for example.
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Isbell Wayne E.
Wallace Robert E.
Buczinski Stephen C.
Varo Inc.
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