Optical pickup device with a floating element

Details Optical pickup device with a floating element Optical pickup device with a floating element

1997-04-14

1998-07-28

Epps, Georgia Y.

Optical: systems and elements

Lens

With support

359819, G02B 702

Patent

active

057869472

ABSTRACT:
An optical pickup device for condensing the light from a light source on a signal recording surface of an optical recording medium, such as an optical disc. A semi-spherical lens of the optical pickup device has a surface 9b facing an optical disc 20 and has a pre-set refractive index. The optical pickup device also has a slider 12 adapted for securing the lens 9 and for being in sliding contact with an optical disc 20, and a spring plate 13 adapted for thrusting and supporting the slider in sliding contact with the optical disc 20. With the optical pickup device, high density reproduction may be realized, while the tolerance value for warping during disc molding or the tolerance value for warping due to moisture absorption may be increased. In addition, the production yield and the degree of freedom in selecting the disc materials may be improved.

REFERENCES:
patent: 5125750 (1992-06-01), Corle et al.
patent: 5247503 (1993-09-01), Nomiyama et al.
patent: 5295122 (1994-03-01), Murakami et al.
patent: 5307336 (1994-04-01), Lee et al.
patent: 5497359 (1996-03-01), Mamin
patent: 5615203 (1997-03-01), Fukakusa

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