A compact dot sight is provided, in which the inner cylinder is eliminated and no structure protrudes from the left and right side walls of a lens barrel. The dot sight includes: a lens barrel; objective lenses fixed to a front opening of the lens barrel; an eyepiece lens fixed to a rear opening of the lens barrel; a light source for projecting a point image from an inside of the lens barrel to the objective lens; a power supply circuit for supplying power to the light source; and a dot adjustment mechanism that has a holder of the light source and can adjust the position of the point image projected on the objective lens by moving the holder vertically and horizontally.

A laminate, including a substrate having a microstructure on a surface thereof; and a coating layer formed on the substrate and encapsulating the microstructure of the substrate. A glass transition temperature T.sub.1 of the substrate is higher than a glass transition temperature T.sub.2 of the coating layer. A method of producing an ophthalmic lens, including deforming the laminate into a shape of the ophthalmic lens by applying heat and/or pressure at a temperature of lower than T.sub.1.

Motorized loupes enable the user to automatically increase or decrease the magnification on demand, without touching the loupes. Each loupe has a micromotor attached to it which moves a lens in the loupe to change the magnification. The motor is battery powered and the batteries are carried in a small housing worn by the user. The housing also contains electronic circuitry that at least reads the position encoders, drives the motors, receives the user's magnification commands and charges the battery when plugged in. A cord runs from each loupe to the housing to carry power and signals. The motors are controlled wirelessly by a foot pedal or by voice so that the user does not have to touch the loupes to change the magnification. In the preferred embodiment of surgical loupes, a TTL loupe is attached to each lens in a user's eyeglasses for binocular vision.

A color temperature adjustable and dimmable magnifier comprises: a housing, a magnifying lens, a plural set of light emitting members and a control member, the housing comprises a lens carrier and a grip connecting the lens carrier; the magnifying lens is set in the lens carrier; the plural set of light emitting members are set around the lens carrier, each set of the light emitting member includes a cold light source and a warm light source; and the control member connects each cold light source and each warm light source, the control member controls turning on and off cold light sources and warm light sources according to the external instructions received, and adjusts the brightness of cold light sources and warm light sources to combine into a plural color temperature. The color temperature adjustable and dimmable magnifier can meet the various needs of users for color temperature and brightness.

A wearable display system includes an eyepiece stack having a world side and a user side opposite the world side. During use, a user positioned on the user side views displayed images delivered by the wearable display system via the eyepiece stack which augment the user's field of view of the user's environment. The system also includes an optical attenuator arranged on the world side of the of the eyepiece stack, the optical attenuator having a layer of a birefringent material having a plurality of domains each having a principal optic axis oriented in a corresponding direction different from the direction of other domains. Each domain of the optical attenuator reduces transmission of visible light incident on the optical attenuator for a corresponding different range of angles of incidence.

The present invention comprises a compact optical see-through head-mounted display capable of combining, a see-through image path with a virtual image path such that the opaqueness of the see-through image path can be modulated and the virtual image occludes parts of the see-through image and vice versa.

An observation optical system includes a display element and an eyepiece lens arranged on an eyepoint side of the display element. The eyepiece lens includes at least one negative lens. In a case where a half value of a longest diameter of a display region in the display element is denoted by H, and a focal length of the eyepiece lens is denoted by f, the observation optical system satisfies a conditional expression represented by 0.35<H/f<0.6.

An endoscope processor includes: an acquisition circuit configured to acquire display size information on a display that is connected to the endoscope processor; a display condition setting circuit configured to set, according to the acquired display size information and properties of an imager of an endoscope that is connected to the endoscope processor, a monitor shift value representing an amount of shift between a first image and a second image corresponding to first image data and second image data, respectively, the first image data and the second image data each having parallax with respect to a same subject; and an image processor configured to shift the first image and the second image to generate display image data to be output to the display using the set monitor shift value.

A display apparatus of the present disclosure includes: a left eyepiece display unit including a left-eye image display device and a left eyepiece optical system guiding a displayed left-eye display image to a left eye; and a right eyepiece display unit including a right-eye image display device and a right eyepiece optical system guiding a displayed right-eye display image to a right eye, and an image magnification upon observation by both eyes is twice or more. The left eyepiece optical system and the right eyepiece optical system each include a plurality of single lenses, and at least one of the single lenses is a free-form surface lens including a resin material. At least one of the single lenses is arranged in at least one of an eccentric state or a rotated state with respect to an optical axis of the left-eye image display device or the right-eye image display device.

A diopter adjustment mechanism comprises a scope tube with a first female thread and a second female thread. The first female thread has a first pitch and is disposed on the scope tube forming a spiral thread and lands between the spiral threads. The second female thread has a second pitch and is disposed on the lands of the first female thread. A jam nut has a male thread corresponding to and engaging the second female thread.