Optical: systems and elements – Lens – With support
Patent
1991-01-29
1992-07-14
Gonzalez, Frank
Optical: systems and elements
Lens
With support
359824, G02B 702
Patent
active
051308541
ABSTRACT:
A supporting unit for lens drive for supporting an objective lens movably in vertical and horizontal directions to focus a light beam on an optical recording medium includes: a lens holder for holding the objective lens; a mounting portion for mounting the lens holder; a fixing portion for fixing the supporting unit for lens drive; a pair of coupling members disposed in parallel with each other in the vertical direction between the mounting portion and the fixing portion; a pair of first hinge portions coupling one end of each of the coupling members to the mounting portion; and a pair of second hinge portions coupling the coupling members to the fixing portion to enable the coupling members to move in the vertical direction. The mounting portion can be divided into upper and lower portions so that the lens holder can be held therebetween. According to the present invention, the hinge portions for coupling the mounting portion for mounting the lens holder to the coupling members have flexibilities in the vertical and horizontal directions and, accordingly, the number of hinge portions for moving the supporting unit for lens drive is reduced.
REFERENCES:
patent: 4750164 (1988-06-01), Nose
patent: 4766583 (1988-08-01), Oinoue et al.
patent: 4767187 (1988-08-01), Gijzen et al.
patent: 4794581 (1988-12-01), Andresen
patent: 4817076 (1989-03-01), Van Sluys et al.
patent: 4818066 (1989-04-01), Nose
Gonzalez Frank
Sharp Kabushiki Kaisha
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