Autofocus distance-measuring optical system
First Claim
1. An autofocus distance-measuring optical system comprising:
- a sighting telescope having a objective lens for sighting an object;
an optical distance meter which includes a light-transmitting optical system for transmitting a measuring light via said objective lens, and a light-receiving optical system for receiving light reflected by the object, the light-transmitting optical system having a reflection member;
a focus detecting device for detecting a focus state of said sighting telescope; and
a controller for controlling said sighting telescope to automatically focus on the object in accordance with said focus state detected by said focus detecting device, wherein said focus detecting device comprises a phase-difference detection type of focus detecting device which detects an in-focus state from a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas of said phase-difference detection type of focus detecting device and passed through different portions of said objective lens of said sighting telescope; and
wherein said two different pupil areas are positioned so that said two light bundles which pass therethrough are arranged to pass around the reflection member without being incident on the reflection member.
3 Assignments
0 Petitions
Accused Products
Abstract
An autofocus distance-measuring optical system includes a sighting telescope having an objective lens for sighting an object; an optical distance meter which includes a light-transmitting optical system for transmitting a measuring light via the, and a light-receiving optical system for receiving light reflected by the object; a focus detecting device for detecting a focus state of the sighting telescope; and a controller for controlling the sighting telescope to automatically focus on the object in accordance with the focus state detected by the focus detecting device. The focus detecting device is a phase-difference detection type which detects an in-focus state from a pair of images respectively formed by two light bundles which are passed through two different pupil areas. The two different pupil areas are positioned so as not to interfere with any optical elements of the optical distance meter.
23 Citations
13 Claims
-
1. An autofocus distance-measuring optical system comprising:
-
a sighting telescope having a objective lens for sighting an object;
an optical distance meter which includes a light-transmitting optical system for transmitting a measuring light via said objective lens, and a light-receiving optical system for receiving light reflected by the object, the light-transmitting optical system having a reflection member;
a focus detecting device for detecting a focus state of said sighting telescope; and
a controller for controlling said sighting telescope to automatically focus on the object in accordance with said focus state detected by said focus detecting device, wherein said focus detecting device comprises a phase-difference detection type of focus detecting device which detects an in-focus state from a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas of said phase-difference detection type of focus detecting device and passed through different portions of said objective lens of said sighting telescope; and
wherein said two different pupil areas are positioned so that said two light bundles which pass therethrough are arranged to pass around the reflection member without being incident on the reflection member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11)
wherein each of said pupil areas is determined so as to have an elongated shape extending parallel to said direction, so as not to interfere with said optical elements arranged in said direction.
-
-
7. The autofocus distance-measuring optical system according to claim 1, wherein said focus detecting device comprises a pair of line sensors on which said pair of images are respectively formed by said two light bundles.
-
8. The autofocus distance-measuring optical system according to claim 7, wherein said focus detecting device comprises an AF sensor unit in which said pair of line sensors are accommodated.
-
11. The autofocus distance-measuring optical system of claim 1, wherein said two different pupil areas are positioned so that said two light bundles which pass therethrough do not interfere with any optical elements of said optical distance meter.
-
9. An electronic distance meter comprising:
-
a sighting telescope having an objective lens;
an optical distance meter including a reflection member;
an AF sensor unit which detects a focus state of said sighting telescope; and
a controller for driving the objective lens of said sighting telescope to focus said sighting telescope on a sighting object in accordance with said focus state detected by said focus detecting device, wherein said AF sensor unit comprises a phase-difference detection type AF sensor unit which detects an in-focus state from a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas of said phase-difference detection type AF sensor and passed through different portions of said objective lens of said sighting telescope; and
wherein optical elements of said optical distance meter are positioned such that the two light bundles which pass through two different pupil areas pass around said reflection member without being incident on the reflection member. - View Dependent Claims (12)
-
-
10. An electronic distance meter comprising:
-
a sighting telescope including an objective lens and an eyepiece;
an optical distance meter including a reflection member;
a phase-difference detection type of AF sensor unit which detects an in-focus position from a pair of images respectively formed by two light bundles which are respectively passed through two different pupil areas of said phase-difference detection type of AF sensor unit and passed through different portions of said objective lens;
a focus adjustment lens positioned between said objective lens and said eyepiece to extend a focal length of said objective lens; and
a controller for driving said focus adjustment lens to focus said sighting telescope on a sighting object in accordance with said in-focus position detected by said focus detecting device;
wherein optical elements of said optical distance meter are positioned such that the two light bundles which are passed through two different pupil areas pass around the reflection member. - View Dependent Claims (13)
-
Specification