Apparatus to focus light on a surface based on color

Details Apparatus to focus light on a surface based on color Apparatus to focus light on a surface based on color

1983-11-21

1986-07-15

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250226, G02B 2740, G03B 300

Patent

active

046008314

ABSTRACT:
Apparatus to focus light onto a given surface, having a light focusing device which has appreciable chromatic aberration; a variable wavelength light source, supplying light through the focusing device to the given surface; a focus detecting device to receive light from the source reflected from the given surface; and control and indicating devices responsive to the wavelength of the light source and to the focus detecting device to vary the wavelength of the light from the light source to maintain the light in focus on the given surface.

REFERENCES:
patent: 4511232 (1985-04-01), Yamada

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