Title:
ELECTRONIC DISTANCE METER
Document Type and Number:
Japanese Patent JP3892704
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic distance meter which is not affected by the status of a measurement point and can perform distance measurement with high precision, and also provide an electronic distance meter in which the center position of a point can be easily recognized when ranging light is used as a collimation pointer.
SOLUTION: In the electronic distance meter having a collimation telescope 10, an electronic range meter 20, an operating portion 44 for switching a ranging mode and a pointer mode, and a control circuit 40, a ranging light mask 61 having a light transmitting portion 61a for determining the shape of a transmitted light beam is disposed in a light transmitting system, and a concentration non-uniform filter in which the light transmittance at the edge portion thereof is lower than the light transmittance at the center portion is equipped to the light transmitting portion 61a. A diffraction mask 62 having minute openings 62a to 62f for generating diffraction stripes from the ranging light 30 at the radius position g on a light transmitting ND filter 29 having a rotational axis parallel to the ranging optical axis 30a through which the ranging optical axis 30a is passed is equipped in the light transmitting system. The control circuit 40 makes the diffraction mask 62 retreated from the ranging optical path in the ranging mode, and puts the diffraction mask 62 on the ranging optical path in the pointer mode.
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Inventors:
Masami Shirai
Shin Suzuki
Takayama Yume
Ueno Masayuki
Shin Suzuki
Takayama Yume
Ueno Masayuki
Application Number:
JP2001332060A
Publication Date:
March 14, 2007
Filing Date:
October 30, 2001
Export Citation:
Assignee:
Pentax Co., Ltd.
International Classes:
G01C15/00; G01C3/00; G01S7/48; G01C3/04; G01C3/06; G01C3/08; (IPC1-7): G01C15/00
Domestic Patent References:
| JP7239448A | ||||
| JP2001255459A | ||||
| JP2001208845A | ||||
| JP8262138A | ||||
| JP59021781U |
Attorney, Agent or Firm:
Kunio Miura