摘要:
Procédé de façonnage d'un élément optique asphérique, tel qu'un élément de miroir composite, comportant les étapes consistant à : - fixer, de préférence par collage, une ébauche (1) d'élément optique, présentant une surface optique (10) destinée à être façonnée, à l'intérieur d'une bague (2), la surface optique de l'ébauche dépassant d'un bord (20) de ladite bague ; - appliquer des efforts et des moments au périmètre (23) de la bague de manière à la déformer de manière contrôlée, en déformant également la surface optique de l'ébauche fixée à son intérieur ; - façonner par abrasion ladite surface optique déformée, de manière à lui redonner une forme sphérique ou planaire ; et - extraire l'ébauche de la bague, de manière à relâcher les contraintes déformant ladite surface optique façonnée pour permettre à cette dernière d'acquérir la forme asphérique souhaitée.
摘要:
The invention relates to a light redirecting film comprising a thin optically transparent substrate having opposite sides, one side of the substrate substantially covered by elongated individual optical elements whose longest dimensions are substantially aligned in a lengthwise direction, wherein the shape of at least some of the optical elements have a visually significant difference, and wherein the layout of optical element shapes and locations is such that objectionable patterns are not visible in the film under standard LCD backlight viewing conditions.
摘要:
The invention relates to an optoelectronic component (1), with an optically active region (100), the optically active region comprising at least one semiconductor chip (2), provided for the generation of electromagnetic radiation (4) and a beam forming element (3), through which at least a part of the electromagnetic radiation emitted by the semiconductor chip during operation passes and which has an optical axis (5). Said optically active region has a quadrant symmetry with relation to a coordinate system (6, 7) perpendicular to the optical axis. The invention further relates to an illumination device comprising such a component.
摘要:
An optical scanning device includes a rotary polygonal mirror, an input optical system for direct a light beam from a light source to a deflecting surface of the rotary polygonal mirror, and an imaging optical system for imaging the deflected light beam on a scan surface, wherein in a main scan section the light beam incident on the deflecting surface has a beam width wider than a width of the deflecting surface, wherein at least one optical surface of at least one imaging optical element of the imaging optical system has a shape in the sub-scan section which shape is a non-arcuate shape including an aspherical coefficient of quartic or higher order, and wherein the aspherical coefficient of quartic or higher order changes in the main-scan direction and from a scan central portion of the imaging optical element to a scan end portion of the imaging optical element.
摘要:
A semiconductor substrate is anodized to be shaped into an optical lens. Prior to being anodized, the substrate is finished with an anode pattern on its bottom surface so as to be consolidated into a unitary structure in which the anode pattern is precisely reproduced on the substrate. The anodization utilizes an electrolytic solution which etches out oxidized portion as soon as it is formed as a result of the anodization, to thereby develop a porous layer in a pattern in match with the anode pattern. The anode pattern brings about an in-plane distribution of varying electric field intensity by which the porous layer develops into a shape complementary to a desired lens profile. Upon completion of the anodization, the semiconductor substrate is shaped into the lens by etching out the porous layer and the anode pattern from the substrate.
摘要:
An extended depth of field is achieved by a computational imaging system that combines a multifocal imaging subsystem for producing a purposefully blurred intermediate image with a digital processing subsystem for producing a recovered image having an extended depth of field. The multifocal imaging system preferably exhibits spherical aberration as the dominant feature of the purposeful blur. A central obscuration of the multifocal imaging subsystem renders point-spread functions of object points more uniform over a range of object distances. An iterative digital deconvolution algorithm for converting the intermediate image into the recovered image contains a metric parameter that speeds convergence, avoids stagnations, and enhances image quality.
摘要:
The present invention is directed to an optical lens (20) for capturing, homogenizing and transmitting substantially all of the light emitted by a light source, such as a light emitting diode (28). The optical lens (20) includes a light transmitting structure having a TIR collector portion (22), a projector portion (24) and a transition portion (26) disposed between the TIR (22) and projector (24). The structure is characterized by the length of the transition portion (26) being longer than the focal length of the TIR portion (22). The light source (28) is disposed within a recess (32) in one end of the TIR portion (22). The light output from the light source (28) is captured by the TIR portion (22) and homogenized to form a uniform, circular near field image within the transition portion (26). The projector portion (24) then projects the circular near field image into a uniform, circular far field image. The present invention transmits 85% of the light emitted by the light source (28) and produces a uniformly illuminated circular image in the far field of the device.
摘要:
There is disclosed an objective lens (21, 31, 41) for an optical disk, comprising a bi-aspherical single lens having a numerical aperture of 0.7 or more, wherein a center thickness of the lens is larger than a focal distance.
摘要:
An optical-quality plastic part is made by forming a PET polarizing film (56) to a desired contour and incorporating the film (56) into a plastic part. The film (56) is placed on a heated lower mold (52) and pressure is applied to conform the film (56) to the lower mold (52) surface. The film (56) is then cooled under pressure prior to incorporation into a plastic part. The film (56) is formed to contour with the optical requirements of the plastic part without jeopardizing its optical, mechanical or cosmetic properties.
摘要:
There is disclosed an objective lens (21, 31, 41) for an optical disk, comprising a bi-aspherical single lens having a numerical aperture of 0.7 or more, wherein a center thickness of the lens is larger than a focal distance.