Diffraction element, optical head device including the...

Optical: systems and elements – Diffraction – From grating

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C359S566000, C369S112030

Reexamination Certificate

active

07088513

ABSTRACT:
A diffraction element includes a light-transmittable member and a diffraction grating formed on at least one face of the light-transmittable member. When a first laser beam having a first wavelength λ1 and a second laser beam having a second wavelength λ2 are transmitted through the diffraction element at first and second diffraction efficiencies, respectively, the diffraction element functions to equalize the first and second diffraction efficiencies to each other by only the one face of the diffraction element. The diffraction grating has a first phase modulation amount ø1 for the first laser beam and a second phase modulation amount ø2 for the second laser beam and the first and second phase modulation amounts ø1 and ø2 are, respectively, approximate to (2πN1±Δø) and (2πN2±Δø) in which “N1” and “N2” are natural numbers and “Δø” is a phase variation amount.

REFERENCES:
patent: 2005/0141391 (2005-06-01), Ueyama et al.
patent: 2005/0163018 (2005-07-01), Yukawa
patent: 2001-281432 (2001-10-01), None
patent: 2002-245660 (2002-08-01), None
patent: 2002-311219 (2002-10-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Diffraction element, optical head device including the... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diffraction element, optical head device including the..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffraction element, optical head device including the... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3714680

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.