A prism and light transmitter module includes a prism holder, a light transmitter, a prism module, a drive circuit board, a shield, and a fixing assembly. The light transmitter is configured to emit or receive a light beam along a light axis. The prism module includes an inclined plane and is disposed within the prism holder with the inclined plane exposed. The drive circuit board is disposed above the inclined plane, and intersects with the light axis at a first angle. The shield is disposed on the drive circuit board. The fixing assembly connects to the prism holder, is configured to fix the drive circuit board, and includes a hole through which the light transmitter is exposed. A binocular capable of measuring distance includes a first optical system and a second optical system. The first optical system or/and the second optical system include the prism and light transmitter module.

A prism and light transmitter module includes a prism holder, a light transmitter, a prism module, a drive circuit board, a shield, and a fixing assembly. The light transmitter is configured to emit or receive a light beam along a light axis. The prism module includes an inclined plane and is disposed within the prism holder with the inclined plane exposed. The drive circuit board is disposed above the inclined plane, and intersects with the light axis at a first angle. The shield is disposed on the drive circuit board. The fixing assembly connects to the prism holder, is configured to fix the drive circuit board, and includes a hole through which the light transmitter is exposed. A binocular capable of measuring distance includes a first optical system and a second optical system. The first optical system or/and the second optical system include the prism and light transmitter module.

An ergonomic digital imaging system obviates the need for, and replaces, the standard microscope with binoculars for viewing images, thereby freeing the user from using his or her hands to manipulate images seen through the binoculars of the microscope, whereby the user can use his or her hands for other tasks, such as dental or other surgery, from a position away from the exhaled breath of the patient being treated. The images are maintained focused, no matter how close or far the viewer is to the viewing display screen. The system is collapsible and portable, so that specialists can take the system from office to office, a plug and play work environment. The extended maneuverability of the camera head results in simple and fast patient positioning, and the camera and display module adjust for any comfortable sit or stand ergonomics of the practitioner.

A fixing mechanism provided for fixing an optical element includes a first fixing rod and a second fixing rod. The first fixing rod has a first sidewall and forms a first groove. The first sidewall is connected to a first extending portion protruding outward from the first sidewall and a first abutting portion. The first groove is located beside the first extending portion. The first extending portion is connected between the first sidewall and the first abutting portion. The second fixing rod has a second sidewall and forms a second groove. The second groove faces the first groove. A first end of the optical element is accommodated in the first groove, and a second end of the optical element is accommodated in the second groove. The first abutting portion abuts against the optical element thereby fixing the optical element in the fixing mechanism. A projection device is also provided.

Methods and apparatus enable an image-viewing system to automatically zoom in and out as target subset matter is tracked. A hand-held body with a lens gathers an image including target subject matter. An image sensor having a resolution in pixels receives the image, and a viewfinder displays at least a portion of the image received by the image sensor. By virtue of the invention, apparatus for automatically zooming out the image displayed in the viewfinder if relative movement is detected between the target subject matter and the body and, and automatically zooming in the image displayed in the viewfinder if the relative movement of the target subject matter slows down or becomes stationary. A power zoom lens may effectuate the automatic zooming, or the zooming may be accomplished digitally without moving parts. The body may form part of a camera, video recorder, binoculars or telescope.

The present invention is a lightweight night vision device (NVD) sealed from environmental conditions, shielded from electromagnetic interference (EMI), and having mechanisms for easy adjustment and fixation of collimation and interpupillary distance. The NVD monocular housing is integrated with the eyepiece, image intensifier tube module, and objective, allowing collimation to be fixed via an optical alignment of the monocular housing to its eyepiece, tube module, and objective. Certain components from existing NVDs may be reused in assembling the present invention to provide cost savings.

A system for parallax correction includes a housing of a camera having a channel perpendicular to an optical axis of the camera. A lens enclosure is within the housing and includes a tab slideable along the channel. A first lens is positioned within the lens enclosure having a first focal plane array. A second lens is positioned within the lens enclosure having a second focal plane array. The second focal plane array is coupled to a pin disposed within the tab of the housing. The tab is configured to direct the pin to slide perpendicular to the optical axis along the channel to move the second focal plane array laterally with respect to the first focal plane array to correct for parallax between the first and second lenses.

A system for parallax correction includes a housing of a camera having a channel perpendicular to an optical axis of the camera. A lens enclosure is within the housing and includes a tab slideable along the channel. A first lens is positioned within the lens enclosure having a first focal plane array. A second lens is positioned within the lens enclosure having a second focal plane array. The second focal plane array is coupled to a pin disposed within the tab of the housing. The tab is configured to direct the pin to slide perpendicular to the optical axis along the channel to move the second focal plane array laterally with respect to the first focal plane array to correct for parallax between the first and second lenses.

This invention teaches a binocular telescope wherein wedge prisms are positioned in the optical path of each telescope to control the amount of perceived parallax between the left and the right images. In one embodiment, a pair of thin wedge prisms are positioned in front of the objective lenses to optically manipulate the real convergence angle of an object viewed through the binocular telescope. In a second embodiment, wedge prisms are positioned after the eyepiece lenses to manipulate the apparent convergence angle of an object viewed through the binocular telescope. Depending on the position and the orientation of the wedge prisms, the invention produces benefits such as better depth perception, increased field of view, and the possibility to view close objects.

A selectable fixed-focus binocular that is highly functional and simple to operate for the end consumers. The binocular combines the close and fine focusing advantages of a traditional binocular with the ease of use offered in a fixed-focus or focus-free style unit to make a versatile, user-selectable focus style binocular. The end-user can use the binocular in a typical, manual focus mode or manipulate the control knob to transition for use as a simple, fixed-focus unit.