A computer monitor viewing device is provided which locates a monitor image at a comfortable viewing location and which is desirably suitable for use by most computer users and, in particular, by bifocal users. The device includes a first mirror positioned to reflect an image from a computer monitor screen and a second mirror which is positioned to reflect the image reflected by the first mirror toward the eyes of a viewer. Supports are also provided for positioning the first and second mirrors....

A stereoscopic viewing apparatus and a related method for providing a three-dimensional effect for a viewer based on a side-by-side display on a conventional video screen of related left and right images that are each horizontally compressed, and a stereoscopic video recording for providing such a side-by-side display. The apparatus transmits the displayed left image to the viewer's left eye and the displayed right image to the viewer's right eye, while horizontally expanding the compressed imag...

A viewing screen protective shield is set forth removably securable in association with a viewing screen, such as LCR screens, as found in fish finders and the like, which are typically exposed to adverse weather conditions. The protective shield is readily removable and replaceable and include convex peripheral edges to conform the shield to the convex screen with an outwardly extending tab formed outwardly of a single corner of the shield to enhance manual grasping thereof. To enhance secureme...

A viewing device for observing objects in near-infrared false-color comprising a pair of goggles with one or more filters in the apertures, and pads that engage the face for blocking stray light from the sides so that all light reaching the user's eyes come through the filters. The filters attenuate most visible light and pass near-infrared (having wavelengths longer than approximately 700 nm) and a small amount of blue-green and blue-violet (having wavelengths in the 500 to 520 nm and shorter t...

The present invention relates to an improved collimator assembly that includes two separate optical paths. Each optical path passes through a corrector lens arrangement substantially centered and aligned with one of two eyepiece lens assemblies. Each corrector lens arrangement is constructed so as to selectively refract light passing through it, in such a manner so as to counteract and reduce the axial chromatic aberrations that occur in the eyepiece lens assemblies.

A ullage tube viewing device for visual checking of liquid cargo levels without releasing hazardous vapors is disclosed and a method of quickly installing such device in a ullage tube in the absence of heat.

A stereoscopic glasses of a construction, in which left and right lenses are formed into a single integral body, which is fitted into a lens frame and maintained in it.

A sight viewing apparatus (10) is disclosed in the preferred form including an extruded tubular portion (12) slideably received on an extruded body portion (56). A lens (36) is captured by first and second extruded collars (42, 44) slideably received within the tubular portion (12). A light bulb (146), spring (148), battery (152), and bolt (154) are received in a first bore (142) in the body portion (56). Light from the enclosed bulb (146) passes through a second bore (144) formed in the body po...

A computer auxiliary viewing system that enables a rapid review of previously entered information, in a similar manner to the retrieval of information using a microfiche reader so that by the simple manual turning of a control knob, all previously entered data can be scrolled for review on a screen. The system includes videographics generating devices responsive to stored information signals in buffer devices for causing the reproduction of the desired scrolling image, and control devices for re...

An automatic screen for projecting an image from a video projector onto it is disclosed. It has a cabinet 1 which accommodates a screen 2. The screen 2 can be moved relative to the cabinet by a chain 5a coupling a front door 1a of the cabinet 1 and a sprocket. The front door 1a of the cabinet 1 is opened in an interlocked relation to the operation of bringing the screen 2 to a set position projected from the cabinet 1. When the screen 2 is no longer used, it can be brought back into the cabinet ...