Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1991-04-09
1992-07-14
Bovernick, Rodney B.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359 86, 359820, G02B 2608, G02F 113
Patent
active
051308398
ABSTRACT:
A scanning optical apparatus comprises a first imaging optical system for imaging a light beam collimated by a collimating optical system so as to form a linear image. The first imaging optical system includes a vari-focal lens using liquid crystal. A scanning deflector is provided for deflecting a light beam which has emerged from the first imaging optical system and for scanning a target with the light beam in a first direction. Electric circuit is provided for varying focal length of the vari-focal lens by generating changes in orientation properties of crystal liquid of the vari-focal lens in synchronization with the timing of scanning of the deflector. A second imaging optical system is provided for imaging a light beam deflected by the scanning deflector on the target. The second imaging optical system is adapted to maintain a geometrically conjugate relationship between the scanning deflector and the target in a second direction perpendicular to the first direction. A temperature detecting element and a temperature control element are provided for controlling temperature of the vari-focal lens so as to maintain the vari-focal lens at a temperature at which anisotropy of index of refraction of the liquid crystal can be maintained.
REFERENCES:
patent: 4128297 (1978-12-01), Bourne
patent: 4323297 (1982-04-01), Kawamura et al.
patent: 4466701 (1984-08-01), Ogata et al.
patent: 4589735 (1986-05-01), Saunders
patent: 4733064 (1988-03-01), Ishikawa
patent: 4756604 (1988-07-01), Nakatsuka et al.
patent: 4762397 (1988-08-01), Pepper
patent: 4861975 (1989-08-01), Kino et al.
patent: 4872743 (1989-10-01), Baba et al.
patent: 4896948 (1990-01-01), Dono et al.
patent: 4915484 (1990-04-01), Yamamoto
patent: 4916318 (1990-04-01), Iima
patent: 4919520 (1990-04-01), Okada et al.
Bovernick Rodney B.
Nguyen Thong
Ricoh & Company, Ltd.
LandOfFree
Scanning optical apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scanning optical apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning optical apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-340029