Extended sonic acceptance angle

Details Extended sonic acceptance angle Extended sonic acceptance angle

1980-06-11

1985-07-30

Hix, L. T.

Optics: motion pictures

Removable film strip magazine type

352 93, 352140, G03B 1918, G03B 300

Patent

active

045318220

ABSTRACT:
An autofocusing motion picture camera having an adjustable focus zoom lens and having means for periodically determining the distance to subjects within the focusing range of said lens is provided with an object presence sensing transducer having an acceptance angle that encompasses the optical field of view angle of said lens whenever the telephoto lens position is selected.

REFERENCES:
patent: 3522764 (1970-08-01), Biber et al.
patent: 4103309 (1978-07-01), Massa

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