An endoscope includes a four color separation prism having a first color separation prism, a second color separation prism, a third color separation prism, and a fourth color separation prism which respectively separate light incident from an affected area into a blue, red and green color components, and an IR component, first, second, third and fourth color image sensors, and a signal output. The first color separation prism, the second color separation prism, the third color separation prism, and the fourth color separation prism are sequentially disposed from an object side when receiving the light incident from the affected area. The first color image sensor is disposed opposite to the second color image sensor and the third color image sensor across an incident ray which is incident vertically to an object side incident surface of the first color separation prism.

An endoscope or other endoscopic instrument is provided with multiple image sensors incorporated into the distal tip, each capturing a portion of the image provided from an optical imaging system. The output from the multiple sensors is combined and manipulated into a single image of a resolution higher than is possible with only one of the sensors. The resulting image, or a portion thereof, can then be displayed to the user. A digital panning feature is also provided where the region of interest displayed from the combined field of view including data from the multiple image sensors is changed.

An endoscope or other endoscopic instrument is provided with multiple image sensors incorporated into the distal tip, each capturing a portion of the image provided from an optical imaging system. The output from the multiple sensors is combined and manipulated into a single image of a resolution higher than is possible with only one of the sensors. The resulting image, or a portion thereof, can then be displayed to the user. A digital panning feature is also provided where the region of interest displayed from the combined field of view including data from the multiple image sensors is changed.

Aspects of the present disclosure involve a system and method for suppressing a Poisson spot. A Poisson spot is a bright spot in the geometrical shadow of circular/spherical shapes. A broad class of telescopes that involve simultaneous transmit and receive require suppression of the reflected light from the secondary mirror on the detector. In one embodiment, coronagraphy petal-shaped masks are fabricated using photolithography and wire-EDM for the suppression of the Poisson spot. The petal-shaped masks can be designed and fabricated to operate at varying Fresnel numbers and petal tip radius-of-curvature (ROC).

An IT-based astronomical telescope system includes a rotatable lens barrel having an eyepiece installed thereon; a detection device for detecting a current orientation of the lens barrel; and an image generator including a micro display provided in the lens barrel. The image generator obtains and displays the picture on the micro display. The IT-based astronomical telescope system works in a virtual reality mode, in which: the image generator is turned on, and based on the current orientation of the lens barrel detected by the detection device, obtains a picture corresponding to an optical image of stars to be imaged by the telescope system with the current orientation; and the micro display displays the picture, which is presented through the eyepiece.

A prism module includes a first prism including a first surface, a second surface and a third surface, a roof prism including a roof surface and a fourth surface, a second prism including a fifth surface, a sixth surface and a seventh surface, and a third prism including a light access surface, a first reflecting surface and a second reflecting surface. A light source is disposed above the second prism and adjacent to the first and the roof prisms. A light beam emitted by the light source enters and is reflected by the third prism, enters the second prism through the seventh surface, passes through the sixth surface, enters the first prism through the third surface, and is reflected by the second surface to leave the prism module. The light beam leaving the prism module is parallel to a baseline passing through the first, the second and the fourth surfaces.

A prism module includes a first prism including a first surface, a second surface and a third surface, a roof prism including a roof surface and a fourth surface, a second prism including a fifth surface, a sixth surface and a seventh surface, and a third prism including a light access surface, a first reflecting surface and a second reflecting surface. A light source is disposed above the second prism and adjacent to the first and the roof prisms. A light beam emitted by the light source enters and is reflected by the third prism, enters the second prism through the seventh surface, passes through the sixth surface, enters the first prism through the third surface, and is reflected by the second surface to leave the prism module. The light beam leaving the prism module is parallel to a baseline passing through the first, the second and the fourth surfaces.

An apparatus is disclosed. The apparatus may include a housing detachably couplable to a sighting device. The housing has a first opening and a second opening defining a viewing axis, and a sight shade disposed adjacent the first opening. The second opening is configured to engage an end of the sighting device. The viewing axis of the housing is coaxial with a viewing axis of the sighting device. The housing also includes at least one elongated member coupled with the housing and extending away from the second opening in a direction that is parallel with the viewing axis. The housing also includes a coupling device that is slidably coupled with the at least one elongated member, and configured to couple the at least one elongated member to the sighting device.

An apparatus is disclosed. The apparatus may include a housing detachably couplable to a sighting device. The housing has a first opening and a second opening defining a viewing axis, and a sight shade disposed adjacent the first opening. The second opening is configured to engage an end of the sighting device. The viewing axis of the housing is coaxial with a viewing axis of the sighting device. The housing also includes at least one elongated member coupled with the housing and extending away from the second opening in a direction that is parallel with the viewing axis. The housing also includes a coupling device that is slidably coupled with the at least one elongated member, and configured to couple the at least one elongated member to the sighting device.

A spectrometer with a Schmidt reflector is described. The spectrometer may include a Schmidt corrector and a dispersive element as separate components. Alternatively, the Schmidt corrector and dispersive element may be combined into a single optical component. The spectrometer may further include a field-flattener lens.