A large-caliber telescope non-linear interference detecting and filtering method is provided. The measure of the oil pad interference is accomplished with one of the following two methods, accelerometer and encoder, or using both of the said methods simultaneously. The filtering of the oil pad interference: set a NOTCH frequency as the main interfering frequency by using NOTCH filter to filter the interference and distinctly improve the telescope performance. The telescope and method is specific to a large-caliber telescope with an oil pad, by using an acceleration sensor and an encoder to precisely measure the non-linear interfering frequency of the telescope oil pad system, by using a NOTCH digital filter to accurately filter the interference due to the oil pad system, and through adjusting parameters of the digital filter to change the filter frequency band on the basis of the change of the oil pad interfering frequency.

A large-caliber telescope non-linear interference detecting and filtering method is provided. The measure of the oil pad interference is accomplished with one of the following two methods, accelerometer and encoder, or using both of the said methods simultaneously. The filtering of the oil pad interference: set a NOTCH frequency as the main interfering frequency by using NOTCH filter to filter the interference and distinctly improve the telescope performance. The telescope and method is specific to a large-caliber telescope with an oil pad, by using an acceleration sensor and an encoder to precisely measure the non-linear interfering frequency of the telescope oil pad system, by using a NOTCH digital filter to accurately filter the interference due to the oil pad system, and through adjusting parameters of the digital filter to change the filter frequency band on the basis of the change of the oil pad interfering frequency.

A method for removing satellite trails from images includes the following: obtaining an initial image having stars, locating stars in the image, removing the located stars from the initial image to form a star-removed image, locating the satellite trail in the star-removed image, determining brightness information for the satellite trail in the initial image, creating a satellite-trail-containing image with only satellite trail brightness information based on the determined brightness information, and subtracting the satellite-trail-containing image from the initial image to remove the satellite trail so as to form a satellite-trail-removed image. Systems for removing satellite trails from images are also provided, as are other aspects.

An imaging system comprises a matched pathlength combining waveguide array including input optical couplers for receiving light, combining waveguides for combining the light received from different input optical couplers and relaying the light to output optical couplers. A lens system is also provided for imaging the light from the output optical couplers. Compared to imaging systems, this imaging system can be much more compact. A standard imaging system requires a focal length at least equal to the aperture (width) of the lens. Because the aperture size of a lens determines the performance of a system (resolution and collected light) there is a limit to how compact a traditional high performance imaging system can be. In contrast, the present system removes that limitation because the minimum practical focal length is now determined by the size of the aperture of the outputs, which can be significantly smaller (by factors of more than 10×, typically).

In a visual target acquisition scope system for an adjustable connection is provided between a unity magnification scope producing 1× magnification image viewed by one eye of the user and a photographic lens/viewfinder of a photographic camera viewed by another eye of the user. According to the system, while the user is looking at an object through the unity magnification scope with one eye and looking at the object through the photographic camera lens with the second eye, the target visible with the first eye is also visible with the second eye.

A sight includes a main body including a focus lens system and an erecting lens system; a first adjusting member disposed in the main body and configured to move the focus lens system along the optical axis; a second adjusting member disposed in the main body and configured to move the erecting lens system in a first direction which is perpendicular to the optical axis; a focus adjusting module disposed in the main body and configured to drive the first adjusting member so as to move the focus lens system along the optical axis; and a first adjusting module detachably joined to the focus adjusting module and configured to drive the second adjusting member so as to move the erecting lens system in the first direction.

A multiple field of view dual band optical device with integrated calibration source is disclosed. Such an optical device is modular, and has a rotating electro-mechanical “tumbler” which houses two orthogonal Galilean afocal optical assemblies as well as at least one uniform temperature source. This modular device is intended to be inserted in front of a camera system which already has an imager optical assembly mated to a detector focal plane array. The disclosed modular device thus serves the purpose of providing to an existing dual-band camera imager up to four new optical fields of view as well as an integral calibration source, all of which can be electro-mechanically selected for viewing by a host camera imager.

Disclosed is a novel assembly and method that enables a user to collimate a focused Cassegrain telescope. The assembly, having a secondary mirror and support baffle, comprising an axle, a bearing, and hub, enables a user to precisely rotate or freely spin a Cassegrain telescope's secondary mirror about its optical axis. Incident to freely spinning the telescope's secondary mirror, the user may peer into the telescope's eyepiece and observe a focused image that may wobble, or remain stable, dependent upon how well the telescope's mirrors are aligned. Further, the assembly's eyepiece, comprising a reticle design, enables the observer to measure the magnitude and direction of image shift incident to the secondary mirror spinning. Lastly, the assembly, comprising a radially marked collimating faceplate, and radially marked collimating knob screws, enables a user to make specific adjustments to the telescope's secondary mirror, compensating for the observed image shift, precisely collimating the telescope.

A method includes defining a designation point on a target within a view area of a scope coupled to a firearm and determining an angular motion deviation of a muzzle of the firearm from the designation point. The method further includes initiating firing of the firearm when the angular motion deviation is below an acceptable level.

A satellite imaging system includes a camera with a pixel shifting mechanism, thermally stable imaging payload, and high-stability attitude determination and control system (ADCS) to improve image resolution. To address the overall stabilization requirement, the satellite incorporates a number of design elements that, in combination, provide the stable result required for good imaging.