Autofocus camera with power control for emitted beam

Details Autofocus camera with power control for emitted beam Autofocus camera with power control for emitted beam

1996-11-26

1998-05-12

Metjahic, Safet

Photography

Camera combined with or convertible to diverse art device

With light beam projector for delineating field of view

396108, G03B 1300, G03B 108

Patent

active

057521158

ABSTRACT:
A camera (10) includes a camera body (12), an objective lens (14) that receives light from a scene (34) and focuses the light on a focal plane (36) in the camera body. An emitter (18) receives power and produces a beam (66) oriented generally along an optical axis (20) of the objective lens such that the beam reflects from an object (32) in the scene. A sensor (22) measures an intensity level of a portion of the beam reflected back from the object to the sensor. An emitter controller (42) adjusts the output power of the emitter when the intensity level measured by the sensor for the reflected visible beam differs from a predetermined level. The beam may be visible or invisible. Corresponding methods of operating such a camera also are disclosed.

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