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5263110 |
Imaging endoscope and endoscopic method employing phase conjugate imaging techniques
An improved endoscope employing phase conjugate imaging principles includes a first transmissive member for transmitting light rays received at a distal tip of the endoscope to an intermediate...
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5191469 |
Afocal variation focusing system for mirrored optical systems
In this system a module carries an afocal variator optical system, and to which module a front partially-obscured reflecting telescopical system and a rear system module can be substantially...
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5188092 |
Disposable rigid endoscope
A disposable endoscope having an object lens assembly, a relay lens assembly, and an imaging lens assembly with at least the relay lens assembly optical elements being made in whole or in part of...
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5124838 |
Optical coupler
An optical device that can be sterilized by autoclaving or immersion. The optical device includes adjoined elements that essentially eliminate any air internal spaces along the optical path. A...
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5097359 |
Endoscope relay lens configuration
Relay lenses for endoscopy include an axially symmetrical three-part optical component having a thin symmetrical negative element interposed between identical, substantially spherical outside...
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5059009 |
Endoscope relay lens
An endoscope relay lens is disclosed for transmitting an optical image along a narrow cylinder. Relay lenses are typically utilized in pairs to constitute a relay lens set and one or more sets are...
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5046845 |
Technoscope for checking damage to surfaces
A technoscope for checking for damage, especially a crack, in a surface of a cavity in a technical component, is arranged not only to establish the area of damage but also to measure the depth of a...
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5020893 |
Biconvex rod lens
A biconvex rod lens for the optics assembly of a medical or technical endoscope comprises of a light transmitting rod and a correcting lens cemented to one end of the rod. The rod is provided with...
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5005960 |
Relay lens system with four optical elements in symmetrical arrangement
What is described here is a relay lens system, specifically for endoscopes or the like, comprising two rod-type lens elements and two further optical elements in symmetrical arrangement relative to...
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4993817 |
Endoscope relay optics
An endoscope relay optics design that reduces the number of air surfaces while maintaining high levels of correction. A lens assembly for incorporation into an optical transfer system (where two...
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4968124 |
Vehicle viewing system
A vehicle viewing system for use on vehicles to enhance the vehicles' safe operation by minimizing blind spots. The system has an objective assembly mountable on the vehicle with its field of view...
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4964710 |
Disposable rigid endoscope
An endoscope is provided with an objective lens system, an ocular lens and an intermediate relay lens system. The relay lens system is a hybrid system using both plastic and glass elements. The...
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4961637 |
Rear view lens apparatus for automotive vehicle
An optical means for an automotive vehicle which expands a driver's visual coverage to include areas which are usually not visible by means of conventional rear view mirrors, comprising an...
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4836649 |
Optical layout for a three light valve full-color projector employing a dual relay lens system and a single projection lens
A liquid crystal light valve projector is disclosed which includes source illumination appratus which images an illumination aperture at the liquid crystal light valves, and further includes light...
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4827098 |
Flexible laser welding head for sleeve-to-tube welding
In one embodiment, a laser welding head is formed of a hollow tubular housing, and includes multiple focusing means for refocusing and realigning the laser beam if it is misaligned relative to the...
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4822154 |
Improvements in or relating to borescopes
An optical assembly 7, 8 providing an optical relay of a borescope 1 has a plurality of lenses 7 spaced apart by tubular spacers 8 through which the optical path extends. The spacers 8 include...
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4805971 |
Periscopic viewfinder
An improved periscopic viewfinder for use following an afocal zoom section in a still electronic imaging camera. The viewfinder features an infrared detector for sensing scene intensity to provide...
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4729647 |
Retrofit optical turret with laser source
A retrofitted optical sight cluster system including a turret support structure defining a lower turret area and upper turret area sealed from the lower turret area, optics mounted onto the turret...
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4726670 |
Security viewer
A security viewer to be mounted through a non-transparent partition, e.g. a door (7), comprises a housing (1) which extends through the door. The housing includes an inlet aperture (8), a screen...
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4697922 |
Dual mode laser velocimeter
A laser velocimeter (12) has a laser beam generator (18) for generating first and second laser beams (20, 22) having a waist (40) of reduced cross-section area. A first focusing lens (28) has a...
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4693568 |
Image transmission optical system for an endoscope
An image transmission optical system for an inflexible-type endoscope comprising two rod-like biconvex lenses, and two thick meniscus lenses which are arranged between the two rod-like biconvex...
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4662728 |
Light guide apparatus
The light guide apparatus will guide a beam whose rays have a predetermined phase space distribution with a maximum deviation angle θ max in a first plane perpendicular to the beam axis. The...
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4626082 |
Projecting device
A projecting device comprising an array of axial element lens systems, wherein each element lens system includes a single bar lens having an axial length larger than the effective aperture and...
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4575195 |
Flat field lenses
A flat field lens system wherein the Petzval sum is corrected without requiring many spaced high powered elements or sharply bent elements. This is achieved by having the Petzval sum correction...
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4512641 |
Compound eye projection device
A compound eye projection device includes a first lens and a second lens equal in shape and power. These two lenses are disposed with their optical axis being coincident with each other and...
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4448499 |
Image transmitter for copying apparatus of slit exposure scanning type
The invention comprises an improvement to a compact copying apparatus of a slit exposure scanning type. A plurality of sheets of plastic lens elements provide an array of optical erecting lens...
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4385810 |
Contact endoscopy and micro endoscopy
An optical system related to optical and rigid endoscopes (8) and allowing, during the same endoscopic examination a switch from low power magnification to high power magnification observation by...
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4364629 |
Operation microscope having a small working distance
The invention contemplates a modular system of interchangeable and multiply-combinable objective-lens components for selective use with an operation microscope to enable improved viewing of small...
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4350411 |
Transfer lens and head-down display using the same
A transfer lens comprises a first field-flattening component of negative power, a second component of positive power providing overcorrect astigmatism, a third component of positive power...
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4208088 |
Multi-axial optical objective for an optical read head in a facsimile system
A multi-axial objective, comprising a number of adjacently arranged elementary systems which are formed by three spheres, the centers of which are situated on the same line, said systems being...
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4168900 |
Compact erect optical imaging copier system and method
An erect optical imaging system for copying apparatus and method of producing the same is provided. A first pair of array sets of thick object lenses is optically aligned with a second pair of...
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4158475 |
Optical system for inverted microscopes
A pair of identical bi-convex triplets, a mirror, and a pentaprism are used to extend the parallel light zone between the objective and the telescope lens of a conventional infinity corrected...
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4148551 |
Modular rod lens assembly and method of making the same
A rod lens assembly having a flexible outer tube and a plurality of lens modules disposed in end-to-end relation therein. Each module comprises a rod lens secured within a protective cylindrical...
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4148550 |
Rod lens assembly and method of making the same
A rod lens assembly for endoscopes and the like which includes an inner tube or barrel disposed in spaced or floating relation within a protective outer tube, the outer tube preferably including an...
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4036218 |
Endoscope
An endoscope comprising optical elements such as field lenses and relay lenses arranged in an outer tube without using tubular spacers so that the intensity of transmitted light becomes high.
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4025155 |
Image-transmitting optical system
An image-transmitting optical system comprising field lenses and relay lenses arranged alternately and glass blocks arranged between each of said field lenses and relay lenses, said...
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3583785 |
POSITIVE OPTICAL SYSTEM
A positive optical system having four optical elements, each of which is aspheric and arranged in pairs with the elements of the pairs being of the same biconvex configuration.
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3506331 |
OPTICAL WAVEGUIDE
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3468598 |
LIGHT BEAM TRANSMISSION SYSTEM
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3466111 |
OPTICAL BEAM REDIRECTOR
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3439971 |
WIDE-ANGLE VIEWING DEVICE
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3414344 |
Flexible optical system for transmitting light or optical images
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3382022 |
Lens guided optical transmission path with diffraction correction
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3326620 |
Linked wave transmitting system for light waves
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3257902 |
Optical system having cylindrical rod-like lenses
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3057258 |
Still camera lens attachment
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2828669 |
Lens system for endoscopes
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