Title:
DOT SITE
Document Type and Number:
WIPO Patent Application WO/2020/049609
Kind Code:
A1
Abstract:
The present invention provides a compact dot site in which the inner cylinder is eliminated and no structure protrudes from the left and right side walls of a lens barrel. The dot site comprises: a lens barrel 10, objective lenses 21, 22 fixed to a front opening 10a of the lens barrel, an eyepiece lens 23 fixed to a rear opening 10b of the lens barrel, a light source 50 for projecting a point image from the inside of the lens barrel to the objective lens 22, a power supply circuit 30 for supplying power to the light source, and a dot adjustment mechanism 40 that has a light source holder 41 and can adjust the position of the point image projected on the objective lens by moving the holder vertically and horizontally, wherein the lens barrel has a diameter of the front opening larger than that of the rear opening, the inner surface shape thereof at least between the objective lens 22 and the eyepiece lens 23 is substantially a truncated cone, no mechanical or optical structure other than the light source and the holder is present in the inner space between the objective lens 22 and the eyepiece lens 23, and the point image is projected directly to the objective lens from the light source.
More Like This:
Inventors:
ABE TAKASHI (JP)
IWANAMI MASATOMI (JP)
IWANAMI MASATOMI (JP)
Application Number:
PCT/JP2018/032576
Publication Date:
March 12, 2020
Filing Date:
September 03, 2018
Export Citation:
Assignee:
LIGHT OPTICAL WORKS LTD (JP)
International Classes:
F41G1/00; F41G3/00; F41G11/00; G01C1/00; G02B23/00
Domestic Patent References:
| WO2006133029A2 | 2006-12-14 |
Foreign References:
| US20050225853A1 | 2005-10-13 | |||
| JP2010528251A | 2010-08-19 | |||
| JPH09509257A | 1997-09-16 | |||
| JP2003504592A | 2003-02-04 |
Attorney, Agent or Firm:
TSUKUNI & ASSOCIATES et al. (JP)
Download PDF: