Optical positioning system for at least one picture element

Details Optical positioning system for at least one picture element Optical positioning system for at least one picture element

1995-06-12

1997-08-26

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359211, 359220, G02B 2608

Patent

active

056615868

ABSTRACT:
In an optical positioning system for at least two picture elements, a wavelength-dispersive, first light-deflecting element is used which deflects light beams in a first deflection direction according to their wavelength. In order to enhance the positioning speed, the optical system comprises a narrow-band light source with a controllable wavelength for every picture element. The first light-deflecting element is arranged in the beam path of a second light-deflecting element with which an additional, essentially wavelength-independent deflection can be implemented. The range of deflection of the first light-deflecting element is thereby noticeably smaller than that of the second light-deflecting element. The ray beams of the said light sources charge or impinge upon the wavelength-dispersive element in common. By setting the wavelength of its light source, each of the picture elements simultaneously receives a desired image position in the range of deflection of the second light-deflecting element around the basic position prescribed by it.

REFERENCES:
patent: 4681394 (1987-07-01), Noguchi
Patent Abstracts of Japan, vol. 10, No. 86, Apr. 4, 1986, p. 443--Hideto Iwaoka "Optical Scanner".
IBM Technical Disclosure Bulletin, vol. 30, No. 7, Dec. 1987, "Dual Laser Reflective Scanner".

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