Corning Incorporated

Corning Precision Lens, Inc.

Brahim Dahmani

Vitaly I Sukhanov

Alexander Galpern

Simon Magarill

John D Rudolph

Bertrand Paris

Roy A Auerbach

Joachim Bunkenburg

E Gregory Fulkerson

Guillaume Guzman

Romain Ramel

Michel André Aegerter

Yuri Korzinin

Jörg Pütz

A material including a glass or vitroceramic substrate having a first layer and a second layer deposited thereon, each of the first and second layers including at least one transparent conducting oxide (TCO). The first layer has a roughness of more than 1 nm and the second layer has a roughness less than or equal to 1 nm. A transmittance in the visible wavelength range of the material is at least 80%. The work function of the second layer is greater than the work function of the first layer and is greater than 4.6 eV.

Material for use in the manufacturing of luminous display devices

A rear projection screen for use with a projection lens which has an exit pupil () is provided. The screen has a light entering side and a light exiting side and comprises in order from said light entering side to said light exiting side: (a) a Fresnel structure (); (b) a lenslet array (); and (c) an opaque layer () comprising a plurality of pinholes, said pinholes being at locations which correspond to the images of the exit pupil formed by the combination of the Fresnel structure and the lenslet array.

Screen for rear projection display

A holographic device, which has first and second roughly coplanar and superposed holograms, which are illuminated by the same non-polarized light beam with at least first and second spectral compositions, the holograms each being recorded in a manner such that in its middle, the axis of the diffracted beam is perpendicular to the direction of the incident beam in this medium, the diffracted beams forming first and second angularly separated light beam with the same polarization, and having different spectral compositions.

Holographic device for formation of colored, polarized and angularly separated light beams and video image projector which utilizes it

A fiber splicing apparatus of the present invention includes a support ( ) for supporting the two optical fibers ( ) such that the ends ( ) thereof are aligned and in physical contact, and a laser ( ) emitting a laser beam ( ) onto the ends of the optical fibers to heat and thereby fuse together the ends ( ) of the fibers ( ). According to another embodiment, an apparatus is provided for heating a region ( ) of one or more optical fibers( ). This apparatus includes a laser ( ) emitting a laser beam ( ) and an optical modulator ( ) positioned to receive and selectively modulate the intensity of the laser beam ( ) to project a modulated laser beam ( ) along a first optical path that terminates at the end ( ) of the optical fiber(s) ( )to be heated. This apparatus further includes a control loop ( ) to monitor the intensity of the modulated laser beam ( ) and control the optical modulator ( ) to thereby regulate the intensity of the modulated laser beam ( ) in response to the monitored intensity level.

Method and apparatus for splicing optical fibers

The device includes a) flat mirror (,) formed by adjacent areas (,) that are alternately transparent and reflecting with parallel and straight lines of demarcation, b) identical first (,) and second (,&prime;) reflection holograms, each delivering at least one diffracted beam with a predetermined spectral composition, c) illuminating source (,) for illuminating said holograms (,&prime;) at normal incidence by the intermediary of said mirror (,), said holograms (,&prime;) being arranged symmetrically with respect to the plane of said mirror (,) in such a way as to be illuminated by the intermediary of transparent (,) and reflecting (,) strips, respectively, of mirror (,), and in such a way that the beams diffracted by the first and second holograms are reflected and transmitted, respectively, by reflecting (,) and transparent (,) strips, respectively, of mirror (,), in order to be combined into a continuous light beam with said spectral composition.

Holographic device for formation of light beams with predetermined spectral compositions and projector of video images containing such a device

Device for elimination of the zero order beam emerging from holograms illuminated in polarized light includes a birefringent plate (,) illuminated by both said zero order beam (,) and by a diffracted beam (,) emerging from the hologram (,). The plate is arranged and sized such that one of the beams (,) emerges from the plate with its plane of polarization not appreciably rotated and such that the other of said beams emerges with its plane of polarization rotated by 90&deg;. The device further includes a polarizer (,) illuminated by the beams (,&prime;) emergent from the birefringent plate (,), the polarizer having its plane of maximum transmittance parallel to the plane of polarization of the diffracted beam emerging from the birefringent plate as beam (,&prime;). The device finds industrial applicability in the optical systems of video image projectors employing active matrix liquid crystal cells.

Growing community of inventors

Montrouge, France

Brahim Dahmani