Title:
【発明の名称】マイクロ画像処理装置
Document Type and Number:
Japanese Patent JP2555611
Kind Code:
B2
Abstract:
An optical apparatus wherein an image is to be focused onto a generally rectangular projection surface through a projection lens and wherein a focal state at a particular location of the projection surface is to be detected to move the projection lens on the basis of the result of detection of the focal state, a method of automatically controlling the focal point of the projection lens, characterized in that, when it is found that the focal state of the particular location of the projection surface can not be detected, a focal state at another location of the projection surface is detected to move the projection lens with respect to the projection surface on the basis of the result of the detection at the other location.
Inventors:
KURYAMA MASAAKI
Application Number:
JP16043587A
Publication Date:
November 20, 1996
Filing Date:
June 26, 1987
Export Citation:
Assignee:
MINOLTA CO LTD
International Classes:
G02B7/28; G03B21/11; G03B27/32; G03B27/34; (IPC1-7): G03B27/32; G03B27/34
Domestic Patent References:
| JP61247157A | ||||
| JP62105571A | ||||
| JP5320851B2 |
Attorney, Agent or Firm:
Nakajima Shiro