An endoscope optical system unit according to the present invention, includes, an endoscope illuminating optical system which includes, a light-emitting section, and a first optical-path deflecting prism group which takes in illumination light emitted from the light-emitting section, and irradiates light to a subject upon deflecting an optical path, and the first optical-path deflecting prism group includes three prisms in order from an object side which are, a first prism, a second prism, and a third prism, and the first prism, the second prism, and the third prism are disposed to be mutually adjacent, and a direction of irradiation of the illumination light is let to be variable to a first direction by rotationally moving the first prism with respect to the second prism, and the direction of irradiation of the illumination light is let to be variable to a second direction which differs from the first direction, by rotationally moving the first prism and the second prism integrally, with respect to the third prism; and an endoscope objective optical system, wherein the endoscope objective optical system includes a second optical-path deflecting prism group, and a lens group, and the second optical-path deflecting prism group includes three prisms in order from the subject side, a fourth prism, a fifth prism, and a sixth prism, and the fourth prism, the fifth prism, and the sixth prism are disposed to be mutually adjacent, and a visual field direction is let to be variable to the first direction by rotationally moving the fourth prism with respect to the fifth prism, and the visual field direction is let to be variable to the second direction which differs from the first direction, by rotationally moving the fourth prism and the fifth prism integrally, with respect to the sixth prism, and the first optical-path deflecting prism group and the second optical-path deflecting prism group are disposed such that a third axis of rotation when the fourth prism rotates with respect to the fifth prism, and a first axis of rotation when the first prism of the endoscope illuminating optical system rotates with respect to the second prism, become coaxial, and the first optical-path deflecting prism group and the second optical-path deflecting prism group are disposed such that a fourth axis of rotation when the fourth prism and the fifth prism rotate integrally with respect to the sixth prism, and a second axis of rotation when the first prism and the second prism rotate integrally with respect to the third prism, become coaxial, and both the visual field direction of the endoscope objective optical system and the direction of irradiation of the illumination light of t

An optical lens includes: two transparent substrates, each transparent substrate being provided with two optical surfaces; and two optical waveguide arrays, arranged between the two transparent substrates by means of glue, optical waveguide extending directions of the two optical waveguide arrays being arranged orthogonally; each optical waveguide array including a plurality of optical waveguide units, each optical waveguide unit having a rectangular cross section, and the plurality of optical waveguide units being joined in parallel; an outer contour of the optical waveguide array being a rectangle and an extending direction of the optical waveguide unit and at least two sides of the outer contour of the optical waveguide array forming an angle of 30 to 60 degrees.

A projection image display device includes: laser diodes which emit excitation light; a top-hat diffusing element which diffuses and provides the excitation light with a top-hat intensity distribution; a phosphor which emits light when illuminated by the excitation light diffused by the top-hat diffusing element; an integrator rod which homogenizes the light emitted by the phosphor; DMDs which modulate the light homogenized by the integrator rod; and a projector which projects the light modulated by the DMDs.

Disclosed is a head-up display device for a vehicle including at least one light source, a liquid crystal display, and at least one polarization converter disposed between the light source and the liquid crystal display and configured to convert unpolarized light generated by the light source into single linearly polarized light and to provide the single linearly polarized light to the liquid crystal display.

A circular includes a housing, a sawing assembly including a motor and a saw blade located at two opposite sides of the housing and connected together so that the saw blasé can be driven by the motor to saw the workpiece and a saw blade shield secured to the housing and covering a part of the saw blade to prevent the saw blade from cutting the surrounding people, and a prism assembly including a protective cover affixed to the front end of the saw blade shield and a prism located in the protective cover to reflect the image of the saw blade sawing the workpiece through a window of the protective cover to the line of sight of the operator. In this way, the operator can clearly confirm whether the sawing path is skewed with the normal operating posture to improve the efficiency.

A circular includes a housing, a sawing assembly including a motor and a saw blade located at two opposite sides of the housing and connected together so that the saw blasé can be driven by the motor to saw the workpiece and a saw blade shield secured to the housing and covering a part of the saw blade to prevent the saw blade from cutting the surrounding people, and a prism assembly including a protective cover affixed to the front end of the saw blade shield and a prism located in the protective cover to reflect the image of the saw blade sawing the workpiece through a window of the protective cover to the line of sight of the operator. In this way, the operator can clearly confirm whether the sawing path is skewed with the normal operating posture to improve the efficiency.

The present disclosure provides an optical system that includes a prism having an incident surface, an exit surface, and one or more reflecting surfaces. A first intermediate imaging position of a light flux in a first direction is located inside the prism. The first intermediate imaging position is different from a second intermediate imaging position of the light flux in a second direction orthogonal to the first direction.

An electronic view finder unit provided in an image pickup apparatus is movable between a retracted state in which the electronic view finder unit is retracted in a main body and a projecting state in which the electronic view finder unit projects from the main body. The electronic viewfinder unit includes a viewfinder having a display device, an eyepiece portion, and a lens holder. The eyepiece portion is slidable between an inserted position and an extracted position in the optical axis direction of the lens. At the position where, in the projecting state, the eyepiece portion is extracted, the viewfinder is rotatable around an axis orthogonal to the optical axis of the lens. Both during the rotating operation of the viewfinder and in a state in which the rotating operation has completed, the movement of the eyepiece portion from the extracted position to the inserted position is limited.

An electronic view finder unit provided in an image pickup apparatus is movable between a retracted state in which the electronic view finder unit is retracted in a main body and a projecting state in which the electronic view finder unit projects from the main body. The electronic viewfinder unit includes a viewfinder having a display device, an eyepiece portion, and a lens holder. The eyepiece portion is slidable between an inserted position and an extracted position in the optical axis direction of the lens. At the position where, in the projecting state, the eyepiece portion is extracted, the viewfinder is rotatable around an axis orthogonal to the optical axis of the lens. Both during the rotating operation of the viewfinder and in a state in which the rotating operation has completed, the movement of the eyepiece portion from the extracted position to the inserted position is limited.

A vehicular interior rearview mirror assembly includes a mounting assembly having a base portion and a mounting arm extending from the base portion. A mirror head is pivotally adjustable relative to the mounting assembly via a pivot joint having first and second pivot elements. The mirror head includes a mirror reflective element, with the first pivot element disposed at the rear side of the mirror reflective element and fixed thereat. The mounting arm includes a proximal end proximate the base portion and a distal end distal from the base portion, with the second pivot element being at the distal end of the mounting arm. The second pivot element is disposed at a damping element that is received at the distal end of the mounting arm. The damping element and the second pivot element are biased toward the distal end of the mounting arm and away from the base portion.