38results about How to "Avoid astigmatism" patented technology

A description is given of an optical structure (100), in particular for determining and stabilizing the relative phase of short pulses, which contains a broadening device (6) for broadening the frequency spectrum of pulses of electromagnetic radiation, and a frequency multiplier device (8) for multiplying at least one frequency component of the pulses, wherein a focusing lens optic (7) is arranged between the broadening device and the frequency multiplier device, which focusing lens optic can be used to focus the pulses into the frequency multiplier device (8). Uses of this optical structure are also described.

The invention discloses a protection device for protecting a cell phone display which comprises, a first covering portion for covering the peripherals of one surface of the display, an opening for displaying the picture on the display, and a second covering portion extending downward from the periphery of the first covering portion to cover the side walls of the display.

The invention discloses a convenient to adjust ultraviolet curing light source which comprises a mainframe box, wherein a lift-and-pull belt and a dustproof heat dissipation hole are fixedly mounted on the outer surface of the upper end of the mainframe box; the dustproof heat dissipation hole is formed in the front end of the lift-and-pull belt; a display screen is mounted on the outer surface, close to the upper end, of the front end of the mainframe box; an adjusting knob and a switch lock are mounted on the outer surface, close to the lower end, of the front end of the mainframe box; the switch lock is positioned below the adjusting knob; a base is fixedly mounted on the outer surface of the lower end of the mainframe box; and a ventilation opening is fixedly mounted on the outer surface of one side of the mainframe box. The convenient to adjust ultraviolet curing light source is provided with a dustproof fan, a spotlight panel and the lift-and-pull belt to remove internal fallen dust and effectively aggregate ultraviolet light so as to prevent light diffusion; and the convenient to adjust ultraviolet curing light source facilitates carrying of a light source, is suitable for different working conditions and brings about better using prospect.

A reflective lighting optical system minimizes a back focusing distance and a depth of the system, and improves a lighting efficiency by disposing a wire grid type PBS (Polarized Beam Splitter) at an oblique angle with respect to a short side of an imager.

The invention relates to a satisfaction evaluation system of highway toll service, in particular to a lamplight modulation satisfaction evaluation system, matched with highway toll stations, of the highway toll station service. The hardware of the lamplight modulation service satisfaction evaluation system is composed of a first ground sensing coil, a second ground sensing coil, a third ground sensing coil, a single chip microcomputer control plate, a voice amplifier circuit board, a lamplight recognizer, a light emitting diode (LED) display screen, a horn and automatic handrails. The lamplight modulation satisfaction evaluation system is characterized in that the lamplight recognizer is used for receiving evaluation information, and has the advantages of being civilized and efficient, guaranteeing active and polite greetings when vehicles come, and being efficient in toll charging in a timing mode. The satisfaction evaluation system is simple, and convenient and quick to operate, can quickly release vehicles, says goodbye to the vehicles, and improves passing efficiency in highways.

The invention discloses a display operation interface structure of a household electrical appliance. The structure comprises an appearance part, a touch key and a PCB assembly arranged on the inner side of the appearance part. The display operation interface structure is characterized in that a window paster is arranged on the external side of the appearance part; at least two spaced content displaying areas are formed on the window paster; first perforations corresponding to the content displaying areas are formed in the appearance part; the first perforations are alternately arranged; the touch key is arranged between the window paster and the appearance part and at least partially corresponds to the content displaying areas; and the PCB assembly has at least two LED lamps corresponding to the first perforations. To-be-displayed contents are formed on the paster, the perforations are alternately formed in the appearance part and the LED lamps are corresponding to the perforations, so the LED lamp light can be isolated by the appearance part and light scattering and light crosstalk can be avoided for the light due to the window paster; and therefore, adjacent displayed contents can be clearly and completely displayed.

The invention discloses a method for improving the luminous flux utilization rate of an LED automobile lamp and the LED automobile lamp. The lamp comprises a vertical plate, the top and the bottom ofthe vertical plate are fixedly connected with a first transverse plate and a second transverse plate correspondingly, the bottom of the first transverse plate is fixedly connected with a rotating device, the interior of the rotating device is movably connected with a rotating disc, the bottom end of the rotating disc is fixedly connected with a rotating rod, the bottom end of the rotating rod penetrates a rotating device and extends to the outer portion of the rotating device, the end, located outside the rotating device, of the rotating rod is fixedly connected with a lens, the rotating device comprises a fixing frame, the top of the fixing frame is fixedly connected with the bottom of the first transverse plate, and rotating grooves are fixedly connected to the two sides of the inner wall of the fixing frame. The invention relates to the technical field of LED automobile lamps. A device for improving the luminous flux utilization rate of the LED automobile lamp drives the lens to rotate, according to different lighting conditions, the luminous flux is adjusted, the lighting effect is good, the luminous flux utilization rate is improved, and light scattering is avoided.

An optical pickup is provided which is capable of minimizing an astigmatism thereof with a simple configuration. The optical pickup 6 includes a collimate lens 16 for transferring optical beams outputted from a laser diode 11 to parallel light, and an objective lens 18 for collecting the optical beams transferred to parallel light with the collimate lens 16 and applying the optical beams to an optical disk 50, wherein mounting angles of the collimate lens 16 and the objective lens 18 are adjusted so that astigmatisms of the collimate lens 16 and the objective lens 18 may be offset by each other. Thus the astigmatism of the optical pickup 6 can be minimized with a simple configuration without need for separately providing means of correcting aberration.

The invention discloses a crossed combinational dual-period grating for quantum well infrared detector. By arranging two sizes of gates across, the invention responses to two wave bands and acquires the information of the two wave bands. The cross array makes a very good response uniformity of the new-type gates on the whole surface, and the two types of gates are distributed as the Chinese character 'pin', which makes the photolithography linewidth up to the maximum and thereby enhances the precision of photolithography patterns. The square gate hole is used to prevent astigmatism; the optimized parameter design enhances the coupling efficiency of the gates. The invention is applied to dual-color quantum well infrared detectors, is able to acquire the objective information more accurately in two wave bands simultaneously, more effectively inhibits the complicate background, and then enhances the detecting effect of objectives. The invention has the advantages of simple fabrication, low cost, and easy realization of mass and serial production.

The invention provides an environment-friendly body building rotary massager capable of promoting motion of skin, accelerating blood circulation, eliminating fatigue of optic and cranial nerves, delaying senility and strengthening the body, which consists of a body building object (1), magnetism (2), rotary massage balls (3), a seat shell (4), a micro motor (5), a bearing (6), a driving wheel (7), a hood (8), a microcomputer (9), a driven wheel (10), a mask (11), massage balls (12), a handle (13), movable plates (14) and a belt (15). The rotary and retractable rotary massage balls have massage, extruding massage, rolling massage and rotary massage functions and an eyesight improving, cosmetic and magnetic, powder, cream, liquid, gas brain-strengthening objects and the like act on channels and collaterals of the skin in three aspects, so that the environment-friendly body building rotary massager achieves the effects of preventing, relieving and eliminating various diseases such as myopia, hyperopia, astigmatism, presbyopia, dark pouches, pouches, wrinkles, color spots, rhinitis, toothache, tinnitus, liposotrichia, dizzy of the head and dim of sight, forgettery, insomnia, migraine, neurasthenia, hypertension, lumbocrural pain, tumours and the like, improves the work efficiency, makes people keep young, and is particularly suitable for curved surfaces, rugged faces, brains and the whole body. The environment-friendly body building rotary massager has the advantages of simple structure, convenience and practicability, and is popular.

A light-emitting element according to an embodiment comprises: a light-emitting unit which is mounted on a PCB and which emits light; a light-shielding part which is spaced apart from the PCB, and which has an opening formed at a location corresponding to the light-emitting unit such that the light emitted from the light-emitting unit passes therethrough; a sealing part arranged between the light-shielding part and the PCB so as to prevent the light emitted from the light-emitting unit from being discharged between the light-shielding part and the PCB; and a transmission part coming into contact with one surface of the light-shielding part facing the direction away from the light-emitting unit, and transmitting the light therethrough, wherein the opening can have, on one side end portion in the direction away from the light-emitting unit, an inclined surface which is an outer circumferential surface gradually expanding in the direction away from the light-emitting unit, so as to prevent the spreading of light having passed through the opening.

Disclosed is a reflective lighting optical system. The reflective lighting optical system can minimize a back focusing distance and a depth of the system, and improve a lighting efficiency by disposing a wire grid type PBS (Polarized Beam Splitter) at an oblique angle with respect to a short side of an imager.

The invention discloses a display device in order to improve resolution of video image, and avoid generating astigmation phenomena of electron beam. The invention includes following parts: multiple cathodes generating multiple electron groups with energies; formation area of electron beam and electron lens area located between cathode and display screen; the electron lens area positioned between formation area of electron beam and display screen. Formation area of electron includes multiple special arranged first group of electrode. Each electrode includes at least one more first holes of pole arranged in line to increase section for electrons with energy to pass through in order to form electron beam. Electron lens area includes multiple special arranged second group of electrode. Each electrode includes at least more than two common holes of pole arranged along longitudinal axis for electrons to pass through in order to form multiple layer common lenses.

The invention relates to a satisfaction evaluation system of highway toll service, in particular to a lamplight modulation satisfaction evaluation system, matched with highway toll stations, of the highway toll station service. The hardware of the lamplight modulation service satisfaction evaluation system is composed of a first ground sensing coil, a second ground sensing coil, a third ground sensing coil, a single chip microcomputer control plate, a voice amplifier circuit board, a lamplight recognizer, a light emitting diode (LED) display screen, a horn and automatic handrails. The lamplight modulation satisfaction evaluation system is characterized in that the lamplight recognizer is used for receiving evaluation information, and has the advantages of being civilized and efficient, guaranteeing active and polite greetings when vehicles come, and being efficient in toll charging in a timing mode. The satisfaction evaluation system is simple, and convenient and quick to operate, can quickly release vehicles, says goodbye to the vehicles, and improves passing efficiency in highways.

The invention provides a kind of diffraction components which use diffracted wave bundles and undiffracted wave bundles, abolish the offset of track and prevent the occurrence of astigmatism, and CD devices which use said diffraction components. Said diffraction components (8) have a number of furrows (81) and convexes (82) which are ranked alternately to a grid regional (86) correspondingly on the surface, while the both surface along the furrows (81) are smooth flat regions (87,88), which are located on the same height of the center of the furrows (81) in depth. Therefore, the furrows (81) are located on the area which is smaller than the section area of beam via setting diffraction components. Even as used as (3) fasciculated beam creating components, it also can prevent diffraction components (8) creating astigmatism, because the flat regions (87, 88) are located on the same height of the center of the furrows (81) in depth.

An optical pickup is provided which is capable of minimizing an astigmatism thereof with a simple configuration. The optical pickup includes a collimate lens for transferring optical beams outputted from a laser diode to parallel light, and an objective lens for collecting the optical beams transferred to parallel light with the collimate lens and applying the optical beams to an optical disk, wherein mounting angles of the collimate lens and the objective lens are adjusted so that astigmatisms of the collimate lens and the objective lens may be offset by each other. Thus the astigmatism of the optical pickup can be minimized with a simple configuration without need for separately providing an element for correcting aberration.