25 February 2002 Uniformity initialization optical system for phase-change optical disk
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Proceedings Volume 4426, Second International Symposium on Laser Precision Microfabrication; (2002) https://doi.org/10.1117/12.456907
Event: Second International Symposium on Laser Precision Micromachining, 2001, Singapore, Singapore
Abstract
The Initializer which has a mechanism that allows for the rotating of the optical disk and scanning the laser head to radial direction, and Initializing the phase-change optical disk with spiral pattern, has basic problems which are caused by this mechanism. In this mechanism, the ruggedness of the laser diode is transcribed on the recording material of the optical disk. This report about the method of reflecting the laser light by the parallel millers that are installed in both sides of the light beam after collimating lens. The reflected lasers light by the parallel millers are focusing on the recording material of the optical disk with the manner of folding. If the reflected time of the lasers light is only one, it is making the 180 degreed rotated images from un-reflected image. And the multiple times reflected laser light make the image at a slightly moved place. So the folded focus image of laser diode is more uniformed compared with the original one and reduces the quality problem, which is caused by un-uniformity of initializing of Phase-Change Optical Disk.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Masaaki Takita, Yoshihiro Okino, Sumio Nakahara, "Uniformity initialization optical system for phase-change optical disk", Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); doi: 10.1117/12.456907; https://doi.org/10.1117/12.456907
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