Imaging system

Details Imaging system Imaging system

2011-07-26

2011-07-26

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S793000, C359S762000, C359S717000, C359S726000

Reexamination Certificate

active

07986464

ABSTRACT:
An image system adapted to a projection display apparatus includes a first lens group having a negative refractive power, a second lens group having a positive refractive power, an aspheric reflector, and a curved reflector. The second lens group includes an aspheric lens which is the nearest to the light valve in the second lens group. A material of the aspheric lens includes glass, the thermal-optical coefficient of the glass is between 1.0×10−6/K and 12.5×10−6/K, and the refractive index of the glass is between 1.482 and 1.847. The aspheric reflector is disposed front of the first lens group for reflecting the image beam passing through the first lens group and second lens group. The curved reflector is disposed above the first lens group for reflecting the image beam reflected by the aspheric reflector onto the screen. The image system has a good imaging quality.

REFERENCES:
patent: 5760965 (1998-06-01), Kim
patent: 6147812 (2000-11-01), Narimatsu et al.
patent: 6471359 (2002-10-01), Kim et al.
patent: 7411737 (2008-08-01), Imaoka et al.
patent: 7643220 (2010-01-01), Chen et al.
patent: 7701649 (2010-04-01), Huang et al.
Geary, Joseph M. Introduction to Lens Design: with Practical ZEMAX Examples. Richmond, VA: Willmann-Bell, 2002. Print.
Ohara Inc. : S-BSM. OHARA. Web. Oct. 21, 2010. <http://www.ohara-inc.co.jp/en/product/optical/list/s-bsm.html>.

Affiliated with

Also associated with

Rating

Imaging system does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2725910