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7380949 Light modulator device  
A method of reducing stray light contribution of a display system is described. Light rays are directed to at least one pixel of the display system and the light rays are modulated to form...
7283314 Zoom lens and image pickup apparatus including the same  
At least one exemplary embodiment is directed to a zoom lens which includes, in order from an object side to an image side, a first lens unit with a negative refractive power, a second lens unit...
7050238 Power combination optical system and light source module  
An optical system includes a plurality of separate light sources with a number M of the light sources arranged in a first direction and a number N of the light sources arranged in a second...
6781740 Achromatic phase shift device and interferometer using achromatic phase shift device  
The present invention relates to an achromatic phase shift device ( 1 ) for introducing a wavelength independent optical phase shift in a first optical beam ( 40 ) during operation, comprising at...
6678095 Anamorphic optical system  
A pair of prisms arranged in a complementary relationship provides for anamorphic magnification and cooperates with a curved refractive element, the later of which generates an aberration that at...
6624956 Numerical aperture limiter  
The invention provides a numerical aperture limiter for an optical thermal imaging system, comprising at least one pair of wedge-like prisms made of a transparent material having a known index of...
6560034 Beam shaping optical system  
A beam shaping optical system which is provided with a first wedge prism having two refractive surfaces defining a first principal section, and a second wedge prism having two refractive surfaces...
6473250 Beam deflector  
A beam deflector has first and second wedge prisms having refractive indices and geometries which are similar (in the case of the geometry to within arc minutes). The prisms are rotatable about an...
6429982 Counter-rotating anamorphic prism assembly with variable spacing  
A counter-rotating anamorphic prism pair assembly with variable spacing allows the simultaneous adjustment of a prism pair using an adjustment member to circularize in cross section a range of...
6421178 Device and method for transforming optical beams  
The invention concerns a device for optically transforming at least a radiation beam having a width extending in the plane X-Y. The device including optical elements provided with optically active...
6342981 Zero-displacement phase retarder device and method  
An optical device includes a substrate 60 and three prisms 10, 20 and 30 . The first prism 10 is disposed adjacent to an upper surface of the substrate 60 . An incoming beam aperture 65 ...
6078441 Optical device for producing rotational displacement of an incident image  
An array of graduated prisms disposed in a circle for rotating an incident image, the prisms are disposed with their end faces at the periphery of the circle and their apices at the center. The end...
5978148 Beam projecting device  
A beam projecting apparatus includes a light source that emits a laser beam and a colliminating lens that renders the emitted laser beam a substantially parallel beam. A beam projecting device...
5953162 Segmented GRIN anamorphic lens  
A segmented GRIN anamorphic lens and a lens array using such lenses are provided. The lens has an optical axis and is composed of a plurality of segments. The interfaces between the segments are...
5825555 Beam projecting apparatus  
A beam projecting apparatus has a light source and a reflecting device for reflecting and rotating a bundle of light emitted from the light source for forming a reference plane. A shape converting...
5818645 Multimode optical source and image scanning apparatus using the same  
A focused laser beam is provided using a multimode laser of a type that generates a diverging beam with an asymmetric cross section. A collimation lens receives and substantially collimates the...
5715102 Beam shaper device for optical read/write heads  
A beam shaper device for an optical read/write head on an optical disc drive is provided. This beam shaper device is particularly useful for shaping a laser beam originally emitted with an...
5701210 Achromatic optical system for beam transformation and optical disk apparatus using the same  
An achromatic optical system for beam transformation is used for example with the optical head of an optical disk apparatus. This optical system is arranged in an optical path which is traversed by...
5701203 Astigmatism correcting element  
In an image-forming optical system in which an astigmatism may occur, an astigmatism correcting element disposed between an image-forming lens (20) and an image-forming surface (12) in order to...
5596456 Achromatic anamorphic prism pair  
An achromatic anamorphic prism pair for the conversion of the elliptical output beam of a tunable diode laser to a circular beam. The achromatic design prevents a directional shift in the output...
5594593 Rear view system for a vehicle  
An optical rear view system for a vehicle, having a reflector mounted to receive light from objects to the rear of the vehicle and to reflect it towards an observer, is provided with at least one...
5557465 Laser plate making apparatus  
A laser plate making apparatus is disclosed for forming a press plate from a form plate sheet. The apparatus includes a laser light source for providing a laser beam, a collimator lens, an...
5541774 Segmented axial gradient lens  
A segmented axial gradient lens and a lens system using such lenses are provided. The lens has an optical axis and is composed of a plurality of segments. The interfaces between the segments are...
5477386 Optical system for optical disc apparatus including anamorphic prisms  
An optical system of an optical disc apparatus is disclosed for converging and projecting a bundle of rays emitted from a light source onto an optical disc. The optical system includes a...
5373395 Optical system to obtain uniform illumination from diode laser  
The diode laser having an elliptic beam and a Gaussian intensity distribution is transformed by graded index lenses and beam shaping prisms to a circular beam of small diameter and then focused to...
5311496 Achromatic expansion prism for magneto-optical drive  
The invention provides an achromatic expansion prism for use in magneto-optical disk drive systems. The achromatic expansion prism comprises a first prism having a first dispersion value, an...
5289316 Measuring objective  
The invention is directed to a measuring objective having a large free operating space and having very small imaging errors with respect to coma, astigmatism and distortion. The main rays are, at...
5274489 Thermal imager systems  
A thermal imager system comprises a scanning system 1 for scanning a required scene 2 and an anamorphic optical system 3 for focusing the scanned scene onto a Sprite detector 4, the optical...
5258989 Solid state laser diode light source  
A laser diode light source comprises at least two laser diodes (1,2). The beams (3,4) of the diodes (1,2) are combined together by, for example, a polarising beam combiner (11) and the combined...
5239414 Laser astigmatism compensation  
In an optical system including a laser diode with astigmatism such that the apparent source position in two orthogonal axes each normal to the beam direction differ, a beam prism expander and a...
5222094 Ring laser  
A ring laser (10) incorporates a laser rod (R) with end faces (R 1 , R 2 ). The first face (R 1 ) is coated for high reflectivity at the laser wavelength and the second (R 2 ) for high transmission...
5184222 Wipe generator having start position and width controller  
A wipe waveform signal generating apparatus includes a wipe width generator generating a wipe width. A wipe waveform extended width holding device outputs a horizontal extended width and a vertical...
5159491 Combination collimating lens and correcting prism  
An optical element for collimating and rectifying divergent incident radiation comprises a first optical surface and a second optical surface titled with respect to the first optical surface. The...
5155633 Anamorphic achromatic prism for optical disk heads  
A multi-element, air-spaced prism system for use in a reflective-type optical media device having a light source to provide an incident light beam provides an achromatic, anamorphic prism which...
5095326 Kepler-type erect image viewfinder and erecting prism  
A Kepler-type erect image viewfinder includes a first prism having an emergent surface being formed of a spherical or an aspherical surface and having a positive power. A second prism has an...
5084616 Scanner having horizontal synchronizing signal generator with prism light diameter reducing means  
A horizontal synchronizing signal detecting optical system of an optical scanning apparatus includes a light receiving element for receiving light flux deflected by a deflector and converged by a...
5016237 Prism optics stable with respect to wavelength and temperature variations and optical information processing apparatus  
Prism optics for changing the shape of a light beam, including a composite prism consisting of at least two types of prisms made of materials having different variations in the refractive index due...
5007713 Beam converting apparatus with a parallel light beam input and output from one prism plane  
The present invention presents a beam converting apparatus which comprises a semiconductor laser element, means for converting the laser beam from the semiconductor laser element into a parallel...
4929067 Method and apparatus for anamorphically shaping and deflecting electromagnetic beams  
A method and apparatus for anamorphically shaping a beam of radiation and for deflecting such beam by 90°. The apparatus consists of a prism having at least four faces, two of such faces being...
4904068 Optical device with phase-locked diodelaser array  
An optical device includes a phase-locked diodelaser array (10), a collimator lens (17), and behind the collimator lens a prism system (30, 34) of at least one prism to broaden the far field...
4902117 Clothing image mirror projection system  
A clothing image mirror projection system for producing a composite image of an article of clothing superimposed upon the reflected image of a viewer's face includes a two-way mirror, a rear...
4902098 Device for correcting the total distortion caused by the shape of a transparent wall  
Device used in aviation for in-flight reception of images corrects distortion resulting from the observation of a field of view through a wall (1) which is transparent in a given spectral band and...
4900138 Composite gradient index and curved surface anamorphic lens and applications  
A composite gradient index and curved surface anamorphic lens has a gradient index of refraction and at least one curved surface. Combinations of planar and radial gradients with spherical and...
4872747 Use of prisms to obtain anamorphic magnification  
An optical system designed to obtain anamorphic magnification without increasing overall system package size and without diminishing post-magnification light levels. Specifically, an output light...
4846550 Optical wedges used in beam expander for divergence control of laser  
Laser beam divergence control is achieved by interposing a pair of optical wedges (41,42) in the beampath of a laser between a pair of lenses (33, 35) of a beam expander (31). The expanded beam has...
4840465 Device for correcting distortion  
Device for correcting the differential distortion resulting from simultaneous observation of a field of view at two distinct locations through a shield transparent in a given spectral band, which...
4828371 Anamorphic laser beam correction optics  
Correction of the ellipticity of a diode laser beam is achieved by an anamorphic beam expansion prism pair that are separated by an angularly rotationally adjustable mirror. The first prism of the...
4808823 Thermal imagers  
An anamorphic optical system for use in a thermal imager with a sprite detector includes two or more optical elements, preferably prisms, which are shaped and positioned so that change in their...
4770507 Prism optics and optical information processing apparatus  
An optical system for converting the shape of a light beam by making use of refraction of prisms comprises a prism optic which includes a complex prism constituted by combination of at least two...
4759616 Method and apparatus for anamorphically shaping and deflecting electromagnetic beams  
A right-angle optical prism is used to anamorphically shape and deflect by 90° a beam of electromagnetic radiation. Preferably, one of the prism's acute angles is cut at Brewster's angle, and the...
Matches 1 - 50 out of 89 1 2 >