37 results about "Reflection nebula" patented technology

The invention discloses a split type high-accuracy antenna reflector adopting an all-composite material, and relates to the fields of wireless detection, satellite communication, electronic measurement and control, electronic interference and the like. The antenna reflector adopts a split structure and comprises a center section and a plurality of fan-shaped sections uniformly distributed around the center section, wherein the center section comprises a center reflection panel, a center base fixedly connected to the back of the center reflection panel, a plurality of long reinforcing ribs and a plurality of short reinforcing ribs; the fan-shaped sections comprise fan-shaped reflection panels and reinforcing ribs fixedly connected to the backs of the fan-shaped reflection panels; the center section and the fan-shaped sections are detachably connected, and the plurality of fan-shaped sections are detachably connected; and the center reflection panel and the plurality of fan-shaped reflection panels jointly form a reflection panel of the antenna reflector. According to the split type high-accuracy antenna reflector adopting the all-composite material, the split mode of a large-diameter antenna is optimized, meanwhile, the reflection panel and a reinforcing back frame are integrally designed, the structure is stable, and transportation, erection and operation of the antenna reflector are facilitated.

The present invention relates to an off-axis dual-reflection head-wearing glasses display optical system, belongs to the fields of optical systems and device design, and is suitable for the fields ofvirtual reality and augmented reality. The system comprises a micro display, two pieces of free-form surface reflectors, a light collimating lens and an aberration correction lens set. The micro display is an OLED about 1 inch, the two pieces of the free-form surface reflectors meet a free-form surface shape equation, and lenses of the light collimating lens and the aberration correction lens setare coaxial, and the surface shapes of the light collimating lens and the aberration correction lens set are in rotation symmetrical modes. The optical system related in the invention is designed according to a reverse optical path. The system is large in view field angle, large in exit pupil diameter, simple in structure, easy to process, small in size and light in weight, the surface shape parameters, the thicknesses, the eccentricity and the inclined angles of the two pieces of the free-form surface reflectors can be taken as optimization variables to more facilitate correction of system aberration.

The invention discloses a fluorescence excitation device. The fluorescence excitation device comprises a laser light source, wherein the laser light source is used for emitting laser beams, the laser beams penetrate through a reflection-type condensation device, pass through a light guide tube and enter a fluorescent crystal, the fluorescent crystal is simulated to emit light, fluorescent light emitted from the fluorescent crystal is reflected to the reflection-type condensation device through a deformable mirror for collimation reflection, the deformable mirror changes under the control of a driving part of the deformable mirror, so that transmission angles of the reflection beams are versatile, and light spots of the beams are uniformly distributed. The invention also discloses a projection light source and projection equipment.

The invention belongs to the waveguide type terahertz functional device technical field and relates to a wide-band terahertz reflector of a composite periodic wave guide structure. Two periodic cylindrical hollow waveguides with different structure parameters, namely, a waveguide a and a waveguide b are connected together so as to form the wide-band terahertz reflector; the cylindrical hollow waveguides have Prague forbidden bands and non-Prague forbidden bands in terahertz bands, and the Prague forbidden bands and the non-Prague forbidden bands are arranged alternately. The wide-band terahertz reflector of the invention has the advantages of simple structure, small size, convenient operation and low cost. The wide-band terahertz reflector has no requirements for directions and can be used in a bidirectional manner with the reflection band and reflectivity of the reflector rarely varied, and the wide reflection band of the reflector ranges from 0.76 to 1.46THz, and the highest reflectivity of the reflector can reach 99.9%; the reflection band and reflectivity can be controlled and changed through adjusting the structure parameters of the two periodic structure waveguides; and the reflector is of a completely closed metal structure, and therefore, electromagnetic radiation and dielectric loss can be avoided, and packaging problems are not required to be considered.

The invention relates to an LED (Light Emitting Diode) luminous lamp. The LED luminous lamp comprises a frame body, wherein the frame body is at least internally provided with an LED exposure-prevention device, wherein the LED exposure-prevention device comprises a plurality of reflection bars which are arranged on the frame body and connected with two sides of the frame body; the reflection bars are vertically arranged, and the distances between the adjacent reflection bars are equal; each reflection bar is provided with a reflecting device; the reflection bar comprises an upper reflection bar and a lower reflection bar; the upper reflection bar and the lower reflection bar are connected together, and an included angle is formed between the upper reflection bar and the lower reflection bar; a supporting rod is arranged in front of the reflection bar; both ends of the supporting rod are connected with the two sides of the frame body; the supporting rod is provided with a plurality of LED lamps which are arranged in order and at equal intervals; a light source of each LED lamp faces to the reflection bar; and the distance between the adjacent reflection bars are between 1 cm and 2 cm. Compared with the prior art, a bather can keep ventilation with outdoors when taking a hot bath in summer, and meanwhile the bather can be prevented from being exposed possibly; and the problem that the bathroom is poor in ventilation and extremely stuffy in summer since the window must be closed in order to prevent exposure is solved.

The invention discloses a millimeter-wave dual reflector antenna capable of focusing a near-field wave beam. The antenna comprises a main reflector, an auxiliary reflector and a feed source, wherein a wave beam emitted by the feed source is reflected by the auxiliary reflector to the main reflector, and then emitted; a curved surface of the main reflector is a revolution paraboloid; and a central point of the main reflector is located at an intersection point of an emitting central axis of the auxiliary reflector and an axis of a radiation wave beam. The antenna is simple in structure and mature to process; the power density of a near-field region axis of the antenna is improved; the maximum power density of the axis is improved greatly under the same input power; a distance range of an effective power threshold is expanded; the efficiency of the antenna is improved; and a near-field gain of the antenna is increased.

The invention discloses a modular LED street lamp reflector cup. The reflector cup comprises reflection areas (A) and (B), a reflector cup framework (C), and light holder mounting holes (E), wherein the reflection areas (A) and (B) consist of a reflection plane or arc shaped structures (1), (2), (3), (4), (5) and (6) respectively. The reflection areas (A) and (B) are connected into a whole throughthe reflector cup framework (C) with a thickness H2 ranging from 1 to 30 mm. The reflector cup framework (C) is provided with light holder mounting holes (E) with a thickness H3 more than or equal to15mm at intervals. The reflection areas have a thickness H1 ranging from 15 to 30 mm, an angle a1 ranging from 90 to 150 degrees, an angle a2 ranging from 10 to 30 degrees, an angle a3 ranging from 10 to 100 degrees, an angle a5 ranging from 10 to 30 degrees, a thickness ranging from 10 to 30 mm, and an angle a5 ranging from 10 to 100 degrees. Light beams of a modular LED light source can be reflected out through a light distributor, thereby effectively solving the axial light emission of an LED. Through changes in the installation direction of the light distributor and the lamp, the actual lighting effect is improved. The reflector cup can help the lamp reach or exceed the requirements on lighting technologies and use effect of lighting devices and has obvious social and economic benefits.