Collimator optical system and optical information storage...

Details Collimator optical system and optical information storage... Collimator optical system and optical information storage...

2006-09-05

2006-09-05

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Collimating of light beam

C359S719000, C369S112030

Reexamination Certificate

active

07102825

ABSTRACT:
The present invention is intended, as an object thereof, to improve stability against both temperature changes and light source output changes, and includes an achromatic lens having a composite structure of glass or a plastic lens having a diffraction grating counteracting a focal length change due to a wavelength change of light, where a lens holder is adhered to an opposite side to a light source of an overhang of the achromatic lens made of glass while the lens holder is adhered to a light source side of the overhang of the plastic lens with the diffraction grating.

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