Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1985-02-25
1986-07-29
Watkins, Donald
Optics: measuring and testing
Range or remote distance finding
With photodetection
350320, 83872, 356388, G02B 508, B26D 520, B26D 522, B29D 1100
Patent
active
046028544
ABSTRACT:
A polyhedral ring mirror is manufactured by molding a synthetic resinous blank having in it a cavity in the form of a four-sided pyramid. The wall surfaces of the cavity are metallized to make them light reflective. The blank is then sliced through in a plane normal to the cavity axis to sever from the blank a minor portion, and to leave behind a major portion in which the form of the cavity has been converted into a truncated pyramid having opposite its original opening a smaller opening. The modified blank with the doubly open cavity is placed, smaller opening down, on a printed wire wiring board around a rectangular electrical component on the board to permit visual inspection from a single viewing point above the component, of all of its sides. The size of the large opening of the cavity can be adjusted by slicing away another portion of the blank.
REFERENCES:
patent: 3117178 (1964-01-01), Webber
patent: 3471236 (1969-10-01), Pearson
patent: 3989495 (1976-11-01), Siegmund
patent: 4101365 (1978-07-01), Fisli
patent: 4127969 (1978-12-01), Hoshi
patent: 4277141 (1981-07-01), Klieber
patent: 4420909 (1973-12-01), Steeve
"Pyramids and Pyramiding", Portfolio, 8/31/75, D. Mcllellan.
AT&T - Technologies, Inc.
Kip, Jr. R. F.
Watkins Donald
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