Matches 101 - 150 out of 272 < 1 2 3 4 5 6 >
Match Document Document Title
6011660 Imaging lens  
An imaging lens is constituted by two lens sheets, in which the lens on the object side is a meniscus lens having a convex surface on the image surface side, and the lens on the image surface side...
5999338 Imaging lens  
An imaging lens with a wide image angle, that is compact and bright, is composed of a first lens group of negative refracting power which has three lens elements which are of positive, negative,...
5999337 Lens system for electronic photography  
A photographic lens system composed of a negative first lens group, a diaphragm, and a positive second lens group, in this order from the object side. The second lens group has a positive meniscus...
5999327 Objective lens system  
An objective lens system consisting of a first lens unit having a negative refractive power and a second lens unit having a positive refractive power wherein the first lens unit or the second lens...
5986817 Eyepiece lens  
An eyepiece lens comprising a single gradient-index lens having a positive refracting power, or comprising a radial gradient-index lens having a positive refracting power, and a field lens, wherein...
5982556 Optical system and lens element for view finder  
An optical system for a view finder reduced in the overall length without aggravation of the optical performance has a negative power object lens and a positive power eyepiece lens each of which...
5978159 Hybrid photographic objective  
The invention provides a high-performance yet low-cost phototaking optical system using a diffractive optical element. The optical system comprises, in order from an object side thereof, a first...
5978158 Phototaking lens system  
The invention provides an inexpensive phototaking lens system comprising a reduced number of lenses, which makes use of a diffractive optical element to make correction for first-order longitudinal...
5978132 Achromatized and athermalized two-lens reimager  
A reimager comprises precisely two positive lenses wherein the chromatic longitudinal aberration lies within the depth of focus and the thermal image position variation likewise lies within the...
5973859 Apochromatic lens system  
An apochromatic lens system which includes, in this order from the object, a positive first lens group and a positive second lens group; wherein the following conditions are satisfied: ν I +...
5923479 Wide-angle lens system  
The invention provides an inexpensive wide-angle lens system which is well corrected for longitudinal chromatic aberration and chromatic aberration of magnification without recourse to any...
5909322 Magnifier lens  
According to the present invention the magnifier lens comprises two lens elements. More specifically, from a front, eye side to a rear, object side there is a front, positive lens element, and a...
5909321 Doublet lens, variable apex angle prism and deviation correction device  
A doublet lens which, on being inserted between the light rays, can perform deviation correction in an afocal state without its focal length being changed. The doublet lens is arranged so that, if...
5875059 Variable focal length lens system having a divergent front lens unit  
Variable focal length lens system comprises two adjacent lens units, one stationary, the other movable. These lens units are in order from an object side towards an image side (i) A first lens unit...
5852508 Lens device, ultraviolet-ray emitting device, and optical disc recording device  
A lens device for focusing a beam of an ultraviolet-ray region, provided with at least one aspherical lens made of synthetic quartz in which an aspherical portion is formed by a coating a...
5835288 Imaging lens  
In a configuration constituted by two lens sheets, the ranges of levels of refractive index n and Abbe number ν of the image-side lens made of a biconvex lens are specified in order to realize an...
5828498 Objective lens of endoscope  
An objective lens for an endoscope includes a front lens of negative power, an aperture stop, and a rear lens group of positive power in this order from the object side. At least one surface of the...
5812327 Imaging lens  
An imaging lens provided with a first component lens (L 1 ), which is a negative meniscus lens, whose convex surface has a large curvature and faces an object to be imaged, and with a second...
5801890 Taking lens system  
An image pickup lens system consists of first and second lens elements arranged in this order from the object side. The first lens element is a meniscus lens having a weak refractive power and...
5796528 Wide-angle lens system  
The invention proves a compact and simple wide-angle lens system composed of a reduced number of lenses and having high productivity, which is well suited for use on digital cameras, while making...
5781336 Method and system for multi-spectral imaging in the visible and infrared spectrums  
Multi-spectral images are detected using a refractive objective lens system. Magnesium oxide (MgO) and calcium fluoride (CaF 2 ) lenses are used to image scenes in both the visible and infra-red...
5781324 Optical scanning lens and optical scanner  
An optical scanning lens is provided with a lens configuration for focusing and correction of field curvature and scanning speed of a deflected laser beam. The lens configuration includes a...
5774250 Optical condenser system for light scanning apparatus  
An optical condenser system for a light scanning apparatus includes a first lens which is a single lens formed of plastic and a second lens which is a plano-convex lens formed of glass and convex...
5764426 Variable focal length optical system  
A variable focal length optical system includes, in the following order from an object side, a first lens unit having a negative refractive power and a second lens unit having a positive refractive...
5757558 Imaging system with rectifying mask  
The optical unit of an imaging system is disposed between a target object and an image plane, and permits the passage of cones of light from different point sources on the target object...
5739965 Wide angle lens system for camera  
A wide angle lens comprises in order from the object end an aperture stop, a first meniscus lens L1 having a convex object end surface and a second positive power lens element L 2 , the lens...
5731916 Image Transmitting optical system  
An image transmitting optical system comprising at least two bar-shaped lens components and constructed to have a numerical aperture enlarged by reserving an adequate space between an image of...
5731912 Photographing lens  
A photographing lens includes a negative first lens group, a diaphragm, and a positive second lens group, in this order from the object side. The photographing lens satisfies the following...
5724195 Fast super wide-angle lens system  
A super wide-angle fast lens system includes a front lens group having a negative power, a diaphragm and a rear lens group having a positive power. The front lens group consists of a first sub-lens...
5715079 Scanning optical system  
A scanning optical system has a deflector and a scanning lens. A convergent beam is deflected at a uniform angular velocity by the deflector. The scanning lens forms the scanned beam into an image...
5706141 Photographing lens  
A photographing lens includes a first lens group, a diaphragm, and a positive second lens group, in this order from the object side. The photographing lens satisfies the following relationships:...
5706140 Optical distance measuring equipment  
An optical distance measuring equipment in which light from a light emission element is transmitted to an object through a light transmission lens, and light reflected on the object is received by...
5699202 Imaging lens  
A first lens group having a four-lens configuration of positive, negative, negative, and positive lenses and a second lens group comprising at least two lenses are disposed successively from the...
5691847 Athermalized and achromatized optical systems employing diffractive optical element  
An athermalized and achromatized optical system (10, 30) has a lens group (12, 32) focusing energy on a focal plane (14, 42). The lens group (12, 32) includes at least two optical elements (22, 24,...
5666228 Retrofocus type lens  
In a negative first lens group composed of four sheets of lenses and a positive second lens group composed of four sheets of lenses, the lens in each lens group placed closest to the enlargement...
5657171 Optical system of optical information recording/reproducing apparatus  
An optical system of an optical information recording/reproducing apparatus including a light source, an objective lens, and a chromatic aberration correcting element is provided and also includes...
5657168 Optical system of optical information recording/ reproducing apparatus  
An optical system of an optical information recording/reproducing apparatus includes a light source for emitting a generally parallel luminous flux. An objective optical system for converging the...
5657158 Microscope having an objective corrected to infinity  
The invention is directed to a microscope having an objective corrected to infinity and a pivotable binocular viewing unit. A tube lens is arranged downstream of the objective. The microscope...
5644437 Optical system of optical information recording/reproducing apparatus  
An optical system of an optical information recording/reproducing apparatus includes an objective lens for converging a generally parallel luminous flux. A chromatic aberration correction element...
5638221 Optical system of optical information recording/reproducing apparatus  
An objective optical system of an optical information recording/reproducing apparatus includes a light source for emitting a generally parallel luminous flux, an objective optical system for...
5631763 Fθ lens system in a laser scanning unit  
An fθ lens system employing two fθ lenses in a laser scanning unit. According to the fθ lens system, a cheap plastic can be used for an fθ lens by lowering the refractive index of one of two...
5619380 Objective optical system for endoscopes  
An objective optical system for endoscopes consisting, in order from the object side, of a front lens unit having a negative refractive power, and a rear lens unit which is composed of a single...
5610758 Variable focal position optical system and light beam scanning apparatus  
A variable focal position optical system which includes a variable focal length lens subsystem whose focal length is variable and a fixed focal length lens subsystem whose focal length is fixed....
5604639 Two-element optical system and camera and method of making a camera  
An optical system comprising two lens elements suitable for use in photographic devices such as single-use cameras having cylindrical image planes. This optical system can operate at F-numbers...
5604630 Night vision monocular with balanced optics  
A night vision device that uses low cost optics in a balanced arrangement that corrects for distortions created by the low cost optics. The night vision device is a monocular assembly that uses a...
5600493 Finite conjugate lens system  
A reading lens system consists of a first lens element which is a positive meniscus lens convex toward the object side, a stop and a second lens element which is a meniscus lens convex toward the...
5557473 Wide angle lens  
A wide angle lens includes, in turn from the object side, a first lens group having a negative refracting power, and a second lens group having a positive refracting power. The first lens group...
5555132 Wide-conversion lens and a zoom lens with it  
A wide-conversion lens for attachment to a master lens system consists of a bi-negative first lens in a object side and a bi-positive second lens in a master lens side, and in the second lens its...
5546236 Wide-angle photographic lens system  
A wide-angle photographic lens system comprising a front lens unit having a positive refractive power, an aperture stop and a rear lens unit having a positive refractive power or a negative...
5508849 Lens optical magnifying system and method of magnifying an object  
This invention provides for a magnification system (10) and a method of construction. The magnification system (10) includes at least a first lens (3) and a second lens (5) lying on a common...
Matches 101 - 150 out of 272 < 1 2 3 4 5 6 >