Collimating lens with temperature compensation and an...

Details Collimating lens with temperature compensation and an... Collimating lens with temperature compensation and an...

2006-11-07

2006-11-07

Phan, James (Department: 2872)

Optical: systems and elements

Collimating of light beam

C359S718000

Reexamination Certificate

active

07133208

ABSTRACT:
A temperature-compensated collimating lens provided of a single piece of lens, which does not have variation in its focal distance due to temperature changes, and an optical scanning apparatus using the same. The collimating lens to transform a ray of light from a light source into approximate parallel rays. The collimating lens is provided a single lens of plastic, and the single lens has a refraction surface provided on one side and a diffraction surface provided on the other side. The refraction surface and the diffraction surface have predetermined powers to prevent power of the collimating lens from changing due to change in temperature. The refraction surface and the diffraction surface have a power to satisfy the condition of,-3≤KdKr≤-2.

REFERENCES:
patent: 5410563 (1995-04-01), Nakamura et al.
patent: 6094286 (2000-07-01), Kato
patent: 6101020 (2000-08-01), Ori
Patent Abstract of Japan No. 2002-6211, published Sep. 1, 2002.

Affiliated with

Also associated with

Rating

Collimating lens with temperature compensation and an... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Collimating lens with temperature compensation and an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collimating lens with temperature compensation and an... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3652324