Optical element, optical disc and rotary encoder with the optica

Details Optical element, optical disc and rotary encoder with the optica Optical element, optical disc and rotary encoder with the optica

1989-05-26

1990-12-18

Ullah, Akm

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 53, 350 9613, 350 9619, G02B 612, G02B 610, G11B 390, G11B 509

Patent

active

049781871

ABSTRACT:
A waveguide path type optical pickup is provided for preventing a returning light from returning back to a light source. A filter for selectively allowing either Te polarized light or TM polarized light to pass through the filter is provided in an optical path from a light source to an optical path deflector. An optical part for changing the polarized state of light is provided in an optical path from the optical path changing part to an information recording medium, thereby prevent a reduction in S/N ratio or reproducing signal.

REFERENCES:
patent: 4184114 (1980-01-01), Minakuchi
patent: 4718052 (1988-01-01), Kondo et al.
patent: 4733065 (1988-03-01), Hoshi et al.
patent: 4763972 (1988-08-01), Papuchon et al.
patent: 4779259 (1988-10-01), Kono et al.
"Dielectric surface-relief gratings with diffraction efficiency" by Applied Optics, 15 Jul. 1984/vol. 23, No. 14 pp. 2303-2310.
"Polarization effects in silicon-clad optical waveguides" by Carson et al., Applied Optics, 1 Sep. 1984/vol. 23, No. 17, pp. 2987-2989.
"Integrated optical circuit" published by Ohm publishing Co. Ltd. pp. 19-24.

Affiliated with

Also associated with

Rating

Optical element, optical disc and rotary encoder with the optica does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical element, optical disc and rotary encoder with the optica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical element, optical disc and rotary encoder with the optica will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1422172