70 results about "Compound prism" patented technology

A projection zoom lens includes, from a screen side to an image source side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power and a fifth lens group having a positive refractive power. Zooming the projection zoom lens from the wide-angle end to the telephoto end causes the second, third and fourth lens groups to move toward the screen side, and the first and fifth lens groups are kept stationary. The projection zoom lens may further include an auto iris being axially movable with the fourth lens group, a composite prism and a cover glass. The projection zoom lens satisfies several conditions so that it can effectively eliminate aberrations and improve the projection image quality.

A light source assembly includes: a plurality of point light sources; a beam composing composite prism including a plurality of light inlet surfaces, a plurality of dichroic planes, and a light outlet surface; and an optical integrator including a plurality of light reflecting planes forming a light guide path, a light inlet end corresponding to one end of the light guide path, and a light outlet end corresponding to the other end of the light guide path. In the light source assembly, the plurality of point sources are each disposed in contact with one light inlet surface of the beam combining composite prism, and the beam combining composite prism and the optical integrator are coupled to each other such that the light outlet surface of the beam combining composite prism and the light inlet end of the optical integrator are in contact with each other.

A dichroic beamsplitter has a composite prism that has at least first and second prism elements that are coupled together along facing surfaces, wherein the respective facing surfaces of the first and second prism elements are equidistant from each other. The composite prism has a first flat external surface that lies within a first plane, a second flat external surface that lies within a second plane that is perpendicular to the first plane, a third flat external surface that lies within a third plane that is parallel to the second plane, and a coated surface internal to the composite prism and having a multilayer thin-film dichroic beamsplitter coating, wherein the coated surface lies within a fourth plane that intersects at least one of the first, second, and third planes at an angle that is less than about 25 degrees.

The invention discloses an optical imaging splicing device of a double CCD image splicing detector which comprises a casing, an object lens group, a composite prism, two uniform CCDs and an optical wedge adjusting mechanism with two double optical wedge components; the double optical wedge components consist of fixed optical wedges and movable optical wedges; the optical wedge adjusting mechanism is arranged in front of one CCD target surface; and optical wedge angle directions of the two double optical wedge components are mutually perpendicular. In installing and debugging process, two adjusting loop-coils connected with the two movable optical wedges by screw threads are rotated, so as to realize precise alignment of splicing edge pixel of semi target optical imaging focusing on two CCD target surfaces. The device of the invention effectively resolves difficulties of debugging operation in prior optical imaging splicing technique. The device has outstanding advantages of simple structure, light weight, convenient and time-saving debugging and high reliability.

Novel optical devices, which are referred to as composite prisms in this document, have been designed, produced and tested. They have the potential to be useful for a number of vision related applications. For high prism diopter (15 prism diopters or more), composite prisms have resulted in thinner, lighter and lower aberration optical devices than the standard ophthalmic prisms currently in use. They also offer significantly better optical quality than the Fresnel press-on prisms which are also used to correct several ophthalmic disorders.

The invention discloses a method and device for measuring the complex refractive index of a coarse thin film on a glass surface. The method is characterized in that a prism, a matching fluid and a glass slide are assembled into a composite prism, one side of the glass slide is plated with a coarse thin film to be measured, and the thin film to be measured is positioned at the bottom of the composite prism; the refractive indexes of the prism, the matching fluid and the glass slide are the same; a laser beam comes into the bottom surface of the composite prism from one side of the composite prism, light beam reflected by the interface of the coarse thin film and the composite prism comes out from the other side surface of the composite prism, and the light intensity of reflected light is measured; the composite prism is rotated step by step or the incident angle of the composite prism is changed step by step to obtain a curve which shows that the reflective light intensity changes along with the incident angle, the curve is compared with the light intensity of the incident light beam to obtain an experimental curve which shows that the reflectivity of the thin film to be measured changes with change of the incident angle, the intensity total reflectivity is calculated, and the complex refractive index of the thin film to be measured is calculated according to the intensity total reflectivity. The method is high in measurement precision, is not limited by the refractive index of the composite prism, and can be used for measuring the complex refractive index of the coarse thin film.

The invention discloses a complex prism for a functional telescope and a binocular telescope optical system thereof. The complex prism includes a first semi-pentaprism, a roof prism and a second semi-pentaprism. The first semi-pentaprism and the second semi-pentaprism have long right-angle surfaces which are adhesive to the bottom surface of the roof prism. A light incoming surface and a light emitting surface of the roof prism are on the same plane and are parallel to the roof ridge, such that an incoming optical axis and an outcoming optical axis of the complex prism are parallel. The binocular telescope optical system includes an objective lens, a complex prism, a reticle lens and an eye lens. The complex prism can obverse, collimate, transmit and receive laser rays and display laser rays.

The invention discloses a stereoscopic display device which comprises a screen, a projection lens, two spatial light modulators, a plurality of light sources, an optical guidance system and a composite prism. The light sources are used for lighting by turns, when one of the light sources emits light rays, the optical guidance system is used for enabling the light rays to be divided into two parts which are then respectively guided to the two spatial light modulators, and the spatial light modulators are used for reflecting the light rays. The composite prism is used for enabling the light rays which are reflected by the two spatial light modulators to be conducted to the projection lens, and the projection lens aims at a screen on a light path to enable the screen to receive the light rays which are projected by the projection lens.

A binocular telescope with digital laser ranging function, comprising an objective component, a beam splitter and coincidence prism system and an ocular component, and the beam splitter and coincidence prism system is arranged between the objective component and the ocular component; the beam splitter and coincidence prism system comprises a roof prism and a composite prism, the composite prism is composed of an isosceles prism, a right-angle prism A and a right-angle prism B, wherein the right-angle prism A and the right-angle prism B have the same shape and symmetrically abut on the two isosceles planes of the isosceles prism. The binocular telescope of the invention not only has observation function, but also has laser ranging function, and can display the target characters such as optical virtual sight and measured distance in the form of character in the field of view.

The invention discloses a TV camera device with four spliced double-light-path CCDs (Charge Coupled Devices) and belongs to the technical field of photoelectrical imaging. Two same imaging lens sets are adopted by the TV camera device; a turning reflector and an image synthesized compound prism are used for superposing two paths of light energies, so that the light energy on each CCD target surface is doubled; the problem of insufficient light energy on the CCD target surface during the process of splicing four single-light-path CCDs is solved; besides, the image synthesized compound prism, two light-splitting compound prisms and two reflectors are utilized to realize the separation of four CCD mounting surfaces; and a tuning mechanism containing two pairs of double optical wedges is used for eliminating the image position deviation of a two-path optical system, so that the problem of image seamless butt-joint during the process of splicing the four CCDs is effectively solved. The TV camera device provided by the invention has the advantages of simple structure, light weight, low cost, convenience in debugging, high reliability, and the like.

The invention relates to an optical light splitting device for receiving three wave bands through a common window and application of the optical light splitting device in handheld, vehicle-mounted andairborne distance measurement camera shooting white light observation equipment and distance measurement double-path camera shooting equipment. The device comprises a common lens group, a composite prism, a beam splitter prism, an avalanche transistor detector, a near-infrared detector and a visible light detector. External light passes through the common lens group and is refracted into two paths of light by the composite prism, wherein one path of light enters the avalanche transistor detector, and the other path of light enters the beam splitter prism and then is refracted into two paths of light, and the two paths of light respectively enter the near-infrared detector and the visible light detector for imaging. The device is simple in structure, small in size and light in weight, achieves the three functions of distance measurement, visible light imaging and near-infrared light imaging at the same time, and is wide in application range and high in adaptability.

A beam separator has a composite prism having an external input face and an external output face co-planar to the input face. At least one polarization beam splitter surface is encased within the composite prism and has an edge that defines a boundary between the external input face and the external output face. A first reflective surface is disposed to redirect, along a direction orthogonal to the input face, light of a first polarization that reflects from the at least one polarization beam splitter.

The present invention relates to a three-color light color combining component prism provided with high-reflection film, which is a right prism shape component prism that consists of six prisms, two layers of light filtering films and two layers of high-reflection films and has the bottom surface as a rectangle with two circumscribed isoceles triangles. All the surfaces of the compound prism are polished surfaces; the two layers of light filtering films mutually intersect in the component prism, having an included angle of 60 degrees; a first light filtering film reflects a first-color light, and has a second-color light and a third-color light permeate; a second light filtering film reflects the third-color light, and has the first-color light and the second-color light permeate; the medial surfaces of two right prisms with the bottom surface as an isoceles triangle are respectively plated with the two layers of high-reflection films. As the three-color light is reflected to respective light filtering films all in an incident angle of 30 degrees, the difficulty of manufacturing the light filtering films is decreased, and the light energy utilization ratio of the three-color light is improved. The utilization of the internal reflection of the high-reflection films ensures that light is reflected to the light filtering films in a smaller incident angle, and especially the green light is short in optical path and high in light energy utilization ratio. In addition, the light filtering films are easy to be made into polarization eliminating light filtering films.

A snapshot ellipsometer or polarimeter which does not require temporally modulated element(s) to measure a sample, but instead uses one or more spatially varying compensators, (eg. microretarder arrays and compound prisms), to vary the polarization state within a measurement beam of electromagnetic radiation. Analysis of the intensity profile of the beam after interaction with the spatially varying compensator(s) and the sample allows sample parameters to be characterized without any moving optics.

The invention is a two-way 2X2 optical switch and the 4X4 free space optical switch made up of the former one, which belongs to optical communication device, especially relates to optical passive device in full gloss communication network, the structure is compact, and it has no relation to polarization, the two-way 2X2 optical switch is only made up of polarization beam-splitting compound prism, lambda/4 wave plate, lambda/2 wave plate, direct angle prism, holophote and polarization light modulator, the 4X4 optical switch has light model structure, and it has no relation to the control of optical signal and the polarization state of the incidence beam. All the output ports and the input ports can interchange without obstacles. The structure is compact, and it can be widely applied to optical communication field.

The invention relates to a color decomposing compound prism whose reflective display element disposed opposite to a prism face having low reflectivity to not only lighting light and projection light and also to light having large incoming angles such as OFF. The color decomposing compound prism is provided with anti-reflection films (AR1, AR2, AR3) arranged on prism end faces (813, 823, 833) of the prism blocks (81, 82, 83) arranged opposite to the reflective display element (14, 15, 16). At least one of the anti-reflection films (AR1, AR2, AR3) is a low-reflection anti-reflection film whose maximum reflection rate of the reflection display element (14, 15, 16) is lower than 2% in an incoming angle range from 0 to 60 degrees.

An openable lid is provided to cover an opening formed in the upper end of a casing of a projection type image display apparatus. Formed on the base of the casing and underneath the opening is a first mount section, on which a plinth is mounted with fixing screws. A prism assembly incorporating at least three liquid crystal panels and three polarization plates for RGB colors integrally attached to a color compounding prism is securely fixed on the plinth. The first mount section is provided with engagement members fixed thereon for temporarily holding the plinth that bears thereon the prism assembly to thereby prevent the plinth from falling downward if the screws are removed to dismount the plinth from the first mount section even when the image display apparatus is installed upside down on a ceiling for example and the lid is open. This permits easy replacement of parts of the projection type image display apparatus that is installed upside down, and thus greatly improves maintenance efficiency of the projector.