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Evaluation device of optical system

A technology of optical system and evaluation device, which is applied in the direction of optical recording head, optical head manufacturing, carrier indicating device, etc., can solve the problem of lengthening the time required for adjustment operations, achieve simplified cost reduction, reduce overall cost, and simplify location tracking effect

Inactive Publication Date: 2009-07-15
LEADER ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This vibration increases the time required for adjustment operations

Method used

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  • Evaluation device of optical system
  • Evaluation device of optical system
  • Evaluation device of optical system

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Experimental program
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Embodiment Construction

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] figure 1 The optical system evaluation apparatus A according to an embodiment of the present invention is shown. As shown in the figure, this optical system evaluation device A has a device for evaluating the optical parameters (such as the inclination of the optical axis) of the optical element (such as an objective lens) in the optical system 1 to be adjusted, which is the optical system to be evaluated. Projection image capture device 3. The projection image capturing device 3 has a projection image for the optical system 1 to be adjusted, for example, a photodetector 5 and a capture controller for capturing a beam spot (BS) image formed by a light beam passing through an optical element in the optical system 7. In addition, the optical system evaluation device A also has a display 8 that displays the captured projection image at a reference position on the disp...

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Abstract

An optical axis evaluation device A of the optical system 1 is equipped with a display device 8 having a display area and a projected image capture device 3 for always displaying the image which is projected on a reference surface from the optical system 1, at a reference position on the display area. The projected image capture device 3 is equipped with an optical detector 5 for picking up the image projected on the reference surface from the optical system and a capture controller 7 for displaying the captured image at the reference position on the display area. Further, the capture controller 7 is equipped with a positioning section 70 which receives a low magnification pick-up image and positions the optical system 1 so as relatively adjustable with respect to the optical detector 5 for operating so that a projected image is positioned in a specific area on a 1st detection area, and a projected image swing suppressing section 72 for receiving a high magnification pick-up image and suppressing the swing on the display area of the projected image by displaying the image of the projected image at the reference position of the display area of a display device 8.

Description

Technical field [0001] The present invention relates to an evaluation device or adjustment device for an optical system such as an optical pickup for CD or DVD, and particularly relates to the evaluation or adjustment of the vibration-resistant structure of such a device and the inclination of the optical axis. Background technique [0002] Hitherto, the optical axis evaluation device or adjustment device of the optical system of the optical pickup for CD or DVD adjusts the inclination of the optical axis of the optical pickup by enlarging and displaying the beam spot image generated by the light beam of the optical pickup. In order to increase the magnification rate of the beam spot image, this type of existing optical axis evaluation / adjustment device is designed to suppress the vibration of the evaluation / adjustment device from the external environment to a certain limit for use. Therefore, in order to use this type of optical axis evaluation / adjustment device, it is necessary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/22G11B7/095
CPCG11B7/08G11B7/13G11B27/34G11B33/14
Inventor 光山亮江上晴久川村贵史前波克俊
Owner LEADER ELECTRONICS