Abstract: A distance measurement apparatus including: a control unit that controls a projection state of light based on a detection result of a target object; a light projection unit that projects light controlled by the control unit onto the target object; and a processing unit that determines a distance to the target object based on a detection result of reflected light. With this, it is possible to accurately project the light onto the target object and determine the distance to the target object by: controlling the projection state of the light based on the detection result of the target object to project the light onto the target object; and determining the distance to the target object based on the detection result of the reflected light.

Abstract: A display apparatus according to the present embodiment includes a storage section for storing distance measurement data acquired by performing a distance measurement and position data indicating a position at which the distance measurement was performed as a set, a position detecting section for detecting a current position, and a display section for displaying the distance measurement data stored as a set with the position data corresponding to the detection result of the current position detected by the position detecting section, within the distance measurement data stored in the storage section. By displaying, with the display section, the distance measurement data stored as a set with the position data corresponding to the detection result of the current position detected by the position detecting section, within the distance measurement data stored in the storage section, only necessary distance measurement data corresponding to the current position can be displayed to the user.

Abstract: There are provided a reticle, a reticle unit, and an optical apparatus, such as a rifle scope, each having a novel configuration that allows formation of a desired pattern. In a reticle 30A1 on which a pattern that serves as an indicator when an object under observation is visually recognized is formed, the pattern is formed of protruding sections 33a and 33b provided on a pattern formation surface 31a of a plate-shaped optical member 31. The protruding sections 33a and 33b are each formed of a plurality of protruding ridges 133 (structural elements) extending in the lengthwise direction of a line that forms the pattern in parallel to the widthwise direction of the line.

Abstract: A distance detector 10 includes a light projecting unit 100 which projects light toward a target body, a light receiving unit 200 which receives a reflected light from the target body, a time detection unit 310 which detects a light receiving time from the projecting of measuring light by the light projecting unit 100 to the receiving of the reflected light by the light receiving unit 200, a calculation unit 320 which calculates the distance to the target body based on a detection result of the light receiving time by the time detection unit 310, and an evaluation unit 340 which evaluates the reliability of a calculation result of the distance to the target body by the calculation unit 320 based on a deviation of the distance corresponding to the calculation result from a reference value regarding the distance to the target body.

Abstract: An ocular lens includes from an object side: a first lens group having negative refracting power, and a second lens group having positive refracting power. An object-side focal plane of the second lens group is positioned between the first lens group and the second lens group. The first lens group includes, from the object side: a meniscus first A lens component whose convex surface is directed toward the object side, and a first B lens component having negative refracting power. The second lens group includes, in a position closest to the object side, a meniscus second A lens component whose concave surface is directed toward the object side, and satisfies conditional expressions.

Abstract: With a ranging device and a ranging method according to the present embodiment, occurrence of a first event in which the intensity of a detection signal corresponding to reflected light output from a detection unit exceeds a first threshold and occurrence of a second event in which the intensity falls below a second threshold smaller or larger than the first threshold are counted for each predetermined elapsed time after the measuring beam emission from a projector. Based on integration results (i.e., histograms) obtained by integrating the counts for a plurality of times of light emission, a target signal derived from the reflected light can be extracted from the detection signal including random noise derived from external light, a detection time from the light emission to the detection by the detection unit can be determined, and a distance to an object can be precisely determined.

Abstract: A display apparatus according to the present embodiment includes a storage section for storing distance measurement data acquired by performing a distance measurement and position data indicating a position at which the distance measurement was performed as a set, a position detecting section for detecting a current position, and a display section for displaying the distance measurement data stored as a set with the position data corresponding to the detection result of the current position detected by the position detecting section, within the distance measurement data stored in the storage section. By displaying, with the display section, the distance measurement data stored as a set with the position data corresponding to the detection result of the current position detected by the position detecting section, within the distance measurement data stored in the storage section, only necessary distance measurement data corresponding to the current position can be displayed to the user.

Abstract: An optical instrument including: an optical system which forms a target object image; a magnification changer which changes a magnification of the target object image; an eyecup member; and an eyecup driver which causes the eyecup member to move in association with alteration of the magnification of the target object image made by the magnification changer.

Abstract: There are provided a reticle, a reticle unit, and an optical apparatus, such as a rifle scope, each having a novel configuration that allows formation of a desired pattern. In a reticle 30A1 on which a pattern that serves as an indicator when an object under observation is visually recognized is formed, the pattern is formed of protruding sections 33a and 33b provided on a pattern formation surface 31a of a plate-shaped optical member 31. The protruding sections 33a and 33b are each formed of a plurality of protruding ridges 133 (structural elements) extending in the lengthwise direction of a line that forms the pattern in parallel to the widthwise direction of the line.

Abstract: Provided is an optical device including an object-side body portion to and from which an eyepiece-side support member supporting an eyepiece system optical component can be attached and removed; an objective system optical component supported on the object-side body portion; a housing section that houses at least a portion of the eyepiece-side support member; a manipulation member by which a rotation manipulation is performed on the housing section; a following member that is driven and displaced by the manipulation member being rotated; and a gripping member that has at least a portion thereof arranged inside the housing section and grips the eyepiece-side support member when the following member is displaced. The manipulation member rotates freely relative to the following member when a gripping force exerted on the eyepiece-side support member by the gripping member reaches a prescribed value.

Abstract: A range finder including a sighting optical system that forms an optical image of a sighting target by sighting a target object and includes a correcting member in an optical path thereof that is driven to correct image blur of an optical image; a driving section that drives the correcting member based on a shaking amount applied to the sighting optical system; a light transmitting section that emits measurement light to a sighting target; a light receiving section that receives returned light from the sighting target and outputs a received light signal; a distance calculating section that calculates distance to the sighting target based on a timing when the measurement light is output and a timing when the return light is received by the light receiving section; and a power changing section that controls a focal distance of the light receiving section according to driving of the correcting member.

Abstract: A distance detection device is provided, including a calculating unit that calculates a distance to a detection target using a length of time until floodlighted light is received by a light-receiving unit; a first detecting unit that detects whether detection target changing operation is being performed; a second detecting unit that detects variation in the distance calculated by the calculating unit; a shake correcting optical system that is driven based on a shake detection result and through which the floodlighted light passes; and a control unit that controls driving of the shake correcting optical system using an output from the first detecting unit and an output from the second detecting unit.

Abstract: Provided is a telescope (TSC) having: an objective optical system (OB); an erecting optical system (PR) for erecting an image formed by the Objective optical system (OB); and an eyepiece optical system (EP) for observing the image which is formed by the Objective optical system (OB) and erected by the erecting optical system (PR). The objective optical system (OB) includes, in order from an object, a first lens group (G1) having positive or negative refractive power, a second lens group (G2) having positive refractive power, and a third lens group (G3) having negative refractive power. The second lens group (G2) and the third lens group (G3) rotate together around a point (O) on the optical axis of the Objective optical system (OB) in order to correct the image.