Title:
LENS UNIT, REAR-SIDE FOCUS ADJUSTMENT SYSTEM FOR INFRARED CAMERA
Document Type and Number:
WIPO Patent Application WO/2015/137320
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide, for an infrared camera, a lens unit that is capable of rear-side focus adjustment even when the position of an infrared sensor detection surface is unknown, and a rear-side focus adjustment system for an infrared camera. To achieve this purpose, provided is a lens unit that can be detachably attached to a camera body which detects infrared light using an infrared sensor and converts the same into an image signal. The lens unit is equipped with a focus adjustment lens and a control means for controlling the position of the focus adjustment lens. The lens unit is characterized in that the control means: calculates a rear-side focus adjustment amount for matching the rear-side focus position to the detection surface on the basis of the difference between the measured focusing position of the focus adjustment lens with respect to a subject that is at a specific subject distance, and a theoretical focusing position of the focus adjustment lens as calculated using the subject distance; and controls the position of the focus adjustment lens on the basis of the rear-side focus adjustment amount.
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Inventors:
UEYAMA YUICHI (JP)
Application Number:
PCT/JP2015/056968
Publication Date:
September 17, 2015
Filing Date:
March 10, 2015
Export Citation:
Assignee:
TAMRON KK (JP)
International Classes:
G02B7/02; G03B17/14; H04N5/225; H04N5/232
Foreign References:
| JP2012173546A | 2012-09-10 | |||
| JPH11183775A | 1999-07-09 | |||
| JPH11133289A | 1999-05-21 | |||
| JP2012181362A | 2012-09-20 | |||
| JPS6410785A | 1989-01-13 |
Attorney, Agent or Firm:
YOSHIMURA, KATSUHIRO (JP)
Katsuhiro Yoshimura (JP)
Katsuhiro Yoshimura (JP)
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