Scanning optical device with aberration compensation feature

Details Scanning optical device with aberration compensation feature Scanning optical device with aberration compensation feature

1995-04-11

1997-03-25

Sugarman, Scott J.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

250235, 356366, 359196, 359216, G02B 2608

Patent

active

056150385

ABSTRACT:
A scanning optical device for scanning a material to be scanned with a beam emitted from a light source thereof, has a storage device for storing information relating to the quantity of deviation of a scanning optical system. The convergent position of the beams is adjustable in the direction of the optical axis by at least partially controlling the elements of the scanning optical system in accordance with information relating the quantity of deviation supplied by the storage device. The quantity of deviation such as curvature of field of the scanning optical system can be compensated by a simple structure. Therefore, a recording device or reading device employing the scanning optical system exhibiting high resolution, low cost and a capability of preventing deterioration in the gradation expression can be realized.

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