Optical recording device and optical recording and reproduction device

一种光学记录、再现装置的技术，应用在光学记录/再现/擦除方法、用光学方法记录/重现、光学记录头等方向，能够解决再现信号光噪声、再现特性恶化等问题，达到减小泄漏光、改善再现特性、改善SNR的效果

Inactive Publication Date: 2009-09-02
FUJIFILM BUSINESS INNOVATION CORP
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when all the pixels of the spatial light modulator are irradiated with light in this way, the leaked light is detected by the photodetector, noise is generated for the reproduced signal light, and the reproduction characteristic deteriorates.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical recording device and optical recording and reproduction device
  • Optical recording device and optical recording and reproduction device
  • Optical recording device and optical recording and reproduction device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Hereinafter, examples of exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings.

[0042] General structure of optical recording and reproducing apparatus

[0043] figure 1 is a schematic diagram showing the structure of an optical recording and reproducing apparatus according to an exemplary embodiment of the present invention. This optical recording and reproducing apparatus is an optical recording and reproducing apparatus of "coaxial recording method (collinear method)", which irradiates an optical recording medium with signal light and reference light sharing an optical axis as recording light of one light beam from the same direction . In this exemplary embodiment, a "coaxial transmission type" optical recording and reproducing apparatus using a reflection type spatial light modulator (SLM) and a transmission type optical recording medium will be described.

[0044] In the optical recording and reprodu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Fluorescence wavelengthaaaaaaaaaa
Login to view more

Abstract

An optical recording device includes a light source, a spatial light modulator, a correcting optical system and a light guiding section. The spatial light modulator includes plural pixels, a signal light region that displays a signal light pattern, and a reference light region that displays a reference light pattern. The spatial light modulator modulates and outputs incident light for each pixel in accordance with a display pattern. The correcting optical system includes a pair of axicon lenses that correct the emitted light from the light source so as to flatten the light intensity distribution thereof on an irradiated surface of the spatial light modulator. The light guiding section guides the corrected light to the spatial light modulator. The signal light and the reference light are irradiated onto an optical recording medium simultaneously and a hologram is recorded into the optical recording medium.

Description

technical field [0001] The present invention relates to an optical recording device, and an optical recording and reproducing device. Background technique [0002] Recently, as a holographic memory recording and reproducing method, a coaxial recording method (collinear method) has been proposed, which is advantageous in that its optical system can be significantly simplified compared with the conventional two-beam interference method, and it is resistant to disturbances such as vibration. External interference, and easy to introduce servo mechanism. In this collinear method, the same lens collects the signal light and reference light modulated and generated by the spatial light modulator along the same optical axis, and the interference fringes (diffraction grating) formed by the interference between the signal light and the reference light ) is recorded as a hologram on an optical recording medium. The signal light pattern in which the digital data is two-dimensionally co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/04G03H1/22G11B7/0065G11B7/135
CPCG11B7/1378G11B7/1381G03H1/0465G03H1/04G03H2222/35G11B7/0065
Inventor 三锅治郎小笠原康裕
Owner FUJIFILM BUSINESS INNOVATION CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap