Title:
MULTI SPECTRUM DIAPHRAGM DEVICE
Document Type and Number:
Japanese Patent JP2018049261
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve the problem in which regarding a diaphragm device for an optical imaging system inclusive of an aperture device, and a medical imaging system inclusive of a sensor, in particular, a camera, the conventional diaphragm device known in an art is not free from inevitable occurrence of hard-to-avoid tradeoff between a depth of field and an amount of light to be transmitted through the optical system, in particular, an amount of light to be incident upon the sensor, and this disadvantage arises from the diaphragm device in the art that similarly transmits or blocks light as to all wavelengths, namely, has a flat transmission characteristic as to a spectrum.SOLUTION: As to one light transmission direction, an aperture device (5) is provided that simultaneously includes at least two apertures (5a) coaxially arranged. Each of the at least two apertures (5a) is configured to limit light in one spectrum band different from each other of at least two separate non-overlapping spectrum bands, and thereby a disadvantage is overcome.SELECTED DRAWING: Figure 1
Inventors:
GEORGE THEMELIS
Application Number:
JP2017157580A
Publication Date:
March 29, 2018
Filing Date:
August 17, 2017
Export Citation:
Assignee:
LEICA INSTR SINGAPORE PTE LTD
International Classes:
G03B9/02; A61B1/00; G02B21/36; G03B9/04; G03B11/00; G03B15/00; G03B15/02
Domestic Patent References:
| JP2009284133A | 2009-12-03 |
Foreign References:
| WO2012098806A1 | 2012-07-26 | |||
| US20130016220A1 | 2013-01-17 |
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Morita Taku
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima
Morita Taku
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima