Title:
PROJECTOR OPTICAL SYSTEM ADJUSTMENT MECHANISM
Document Type and Number:
Japanese Patent JPH0534819
Kind Code:
A
Abstract:
PURPOSE: To offer the projector optical system adjustment mechanism facilitates the adjustment of the distance back focus length(BFL) between an image display means such as a CRT and a lens system without requiring any spacer and enables fine adjustments.
CONSTITUTION: A moving plate 4 is coupled with a CRT coupler 2, which supports the CRT 1, through four BFL adjusting screws 3 movably in the direction of an optical axis and the moving plate 4 is fitted with the lens system 11 through an intermediate frame 4 and a lens coupler 9. Then the four screws 3 are rotated synchronously through a sprocket 15 and a chain 16 to move the moving plate 4 in parallel to the CRT coupler 2.
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Inventors:
NUMATA KIYOSHI
MARUYAMA TOSHIO
OKUMURA RYUICHI
MARUYAMA TOSHIO
OKUMURA RYUICHI
Application Number:
JP21627291A
Publication Date:
February 12, 1993
Filing Date:
August 02, 1991
Export Citation:
Assignee:
SONY CORP
International Classes:
G02B7/02; G03B21/00; G11B27/02; H04N5/74; (IPC1-7): G02B7/02; G03B21/00; H04N5/74
Attorney, Agent or Firm:
Yoshio Inamoto