Title:
DISTANCE MEASURING INSTRUMENT
Document Type and Number:
Japanese Patent JP3793403
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a distance measuring instrument which can improve the distance measuring accuracy.
SOLUTION: A line sensor 36b is provided which has a plurality of photoelectric transducer elements for photoelectrically transducing and integrating lights received on an object to output electric pixel signals, a CUP 21 A/D-converts the pixel signals outputted from the photoelectric transducer elements of the line sensor 36b to obtain pixel data, 4EV-logarithmically transforms the pixel data to obtain 4EV-sensor data, and executes the distance measuring operation using the 4EV-sensor data. If no effective distance measuring operation value is obtained from the distance measuring operation using the 4EV-sensor data and the contrast is low with a high brightness, it inhibits the logarithmic transformation, actuates the line sensor 36b to re-execute the integral, and again executes the distance measuring operation using the pixel data obtained by A/D-converting the pixel data outputted by the photoelectric transducer elements of the line sensor 36b.
Inventors:
Nakato Naoto
Application Number:
JP2000252087A
Publication Date:
July 05, 2006
Filing Date:
August 23, 2000
Export Citation:
Assignee:
Pentax Co., Ltd.
International Classes:
G01C3/06; G02B7/28; G02B7/36; G03B13/36; (IPC1-7): G01C3/06; G02B7/28; G02B7/36; G03B13/36
Domestic Patent References:
| JP61105520A | ||||
| JP10090593A | ||||
| JP7120256A |
Attorney, Agent or Firm:
Kunio Miura