TW455697B - System for collecting and condensing light - Google Patents

Abstract

A collecting and condensing system includes a paired reflector set having a first, or collecting, reflector that collects radiation emitted from a radiation source and collimates the collected radiation into parallel beams directed to a portion of a second, or condensing or focusing, reflector which focuses the light onto a target along the common optical axis shared by the two reflectors. An opening is formed in the second reflector to permit the radiation to be transmitted from the source located at the focal point of the first reflector toward the first reflector, and an opening is formed in the first reflector to permit the radiation reflected and focused by the second reflector to be transmitted to a target located at the focal point of the second reflector. A lens having the same common optical axis and the same focal points of the first and second reflectors is positioned between the reflectors to collect and condense radiation that would otherwise be lost through the openings formed in the respective reflectors. The overall system produces essentially unit magnification. In addition, a retro-reflector may be added to increase the overall flux density at the target. Multiple electromagnetic sources and associated paired reflector sets can be cascaded along the common optical axis to increase the brightness at the target.

Description

45 56 9 7 V. Description of the Invention u) Scope of the Invention The present invention relates to a system for collecting and concentrating electromagnetic radiation, such as light, and in particular, a system using a pair of opposing concave reflector surfaces to collect a radiation source The emitted radiation is focused on a target. BACKGROUND OF THE INVENTION Collecting, focusing, and coupling light into a standard waveguide, such as a single fiber, a fiber bundle, or a system in a homogenizer, has the purpose of directing the light at the target (i.e., the The brightness at the input end of the wave guide is increased to the maximum. Prior art systems using on-axis reflectors and reflectors using spherical, elliptical, and parabolic reflectors have the advantage of circular symmetry. However, on the other hand, such a reflector will substantially reduce the brightness of the light source, because the magnification of the light emitted by the light source will vary with different angles and different collision parts on the reflective surface. Variety. Off-axis systems that are not circularly symmetric have a large range to overcome changes in magnification and also use spherical, elliptical, and parabolic reflectors. SUMMARY OF THE INVENTION The present invention relates to a device for collecting radiation emitted from a source of electromagnetic radiation and focusing the collected radiation onto a target. The device includes a collection reflector having a concave reflective surface, and an opening formed therethrough, and a focusing reflector having a concave reflective surface, and an opening formed therethrough. The collecting and focusing reflector is positioned and oriented in a relative and opposite relationship with its individual concave reflective surface. The focusing reflector is positioned with respect to the collecting reflector, so that the positioning

455697 V. Description of the invention (2) An electromagnetic radiation source near the opening of the focusing reflector will reflect at least a portion of the electromagnetic radiation 'through the opening toward the reflective surface of the concave surface of the collecting reflector. The collecting reflector is positioned with respect to the focusing reflector, so that the electromagnetic radiation reflected by the concave reflecting surface of the focusing reflector is transmitted through the opening formed through the collecting reflector and directed toward the collecting reflection. A target positioned near the opening in the device. The collecting reflector reflects at least a part of the electromagnetic radiation incident thereon onto the reflective surface of the concave surface of the focusing reflector, and the focusing reflector impinges at least a part of the concave reflective surface thereof The electromagnetic radiation is reflected through the opening formed in the collecting reflector, and is directed toward the target. The concave reflecting surface of the collecting and focusing reflector preferably has a parabolic shape. Furthermore, the optical axes of the individual parabolic reflecting surfaces preferably extend through the openings formed in the collecting and focusing reflectors in agreement with each other, and the focal point of the collecting reflector is preferably positioned closest to the opening. The opening is formed in the focusing reflector, and the focus of the focusing reflector is preferably positioned closest to the opening, and the opening is formed in the collecting reflector. The device may also include a focusing lens' disposed between the focusing lens and the focusing reflector. The focusing lens receives a part of the electromagnetic radiation, passes through the opening formed by the focusing reflector, and focuses the received electromagnetic radiation through the opening formed in the collecting reflector. An electromagnetic source ', such as xenon, metal halide, halogen, or mercury, may or may not contain part of the device. The same, — 目 ^,

Page 7 45 56 9 7 V. Description of the invention (3) For example, the input part of a wave guide, such as a homogenizer with a single optical fiber, a fiber bundle, or a ring or polygonal shape, may or may not include the Part of the device. Other features and characteristics of the present invention will become more apparent by referring to the drawings * and considering the scope of the following description and additional patent applications. All the drawings form a part of this specification, and among the different drawings, similar The corresponding reference number indicates the corresponding part. Brief Description of the Drawings Figure 1 is a schematic diagram of an ideal paired reflector system for collecting light from a light source and focusing the collected light onto a target at a single magnification. FIG. 2 is a schematic diagram of an actual paired reflector system. The system includes an arc lamp, an output fiber, a retro-reflector, and an opening formed in the opposite reflector to receive the arc from the opposite reflector. The light from the lamp passes through the output fiber. Fig. 3 is a schematic diagram showing the loss of radiant energy for the light source and the output fiber through the opening formed in the opposite reflector. Figure 4 is a schematic diagram showing a pair of reflector systems that uses a focusing lens to collect and focus radiation, otherwise causing losses through the openings formed in the reflector. Figure 5 is a schematic diagram of a cascade system in which the outputs of multiple light sources are added together to increase the brightness of the target. 6A-6G are schematic diagrams of multiple polygon light guides (waveguides) targets and cross sections, which can be used in the embodiment of the present invention.

O: \ 64 \ 64973.ptc Page 8a 2001.06. 29.009 455697 n _Case No. 89112994 July 2015 Amendment V. Description of Invention 26b Focus 26c Focus 28 Open V 2 8a Open 28b Open 28c Open 30 Electromagnetic radiation source 30a Light source. 3 0b light source 30c light source 32 @ 40 arc lamp 42 spherical retroreflector 44 single output fiber 46 loss cone 50 focus lens 5 0a focus lens 50b focus lens 50c focus lens 54 fiber bundle 60 Lubiao

O: \ 64 \ 64973.ptc Page 8b 2001.06. 29.010 455697 V. Description of the invention (4) 'Detailed description of the preferred embodiment Please refer to the accompanying drawings, and an exemplary embodiment of the present invention will now be described. These examples illustrate the principles of the invention and their architecture is not intended to limit the scope of the invention. An ideal paired reflector collection and focusing system is shown schematically in Figure 1 and is generally designated by reference number 2. The system 2 includes a first reflector 10 (also known as the collecting reflector), a reflective surface 12 having a concave surface, and a second reflector 20 (also known as the focusing or focusing reflector), which also has a concave surface.的 Reflective Surface 22. The concave reflecting surfaces 12 and M are arranged in a relative facing relationship ', and the outer shape is preferably parabolic. The reflective surfaces 12 and 22 may be coated with any suitable reflective material, such as aluminum, silver, or a single or multiple layers of dielectric coatings, for use in different color systems, such as a cold mirror for visible light. . The first reflector 10 has an optical axis 14 on which a focal point 16 is placed. Similarly, the second reflector 20 has an optical axis 24 on which a focal point 26 is placed. The first reflector 10 and the second reflector 20 are preferably arranged so that their respective optical axes 14 and 24 overlap each other. In the ideal system 2 _ shown in FIG. 1, the electromagnetic radiation source 3 0 is disposed on the focal point 16 of the first reflector 10, and a target 3 2 is disposed on the second reflector 20. The intersection point is 2 to 6. The radiation emitted by the radiation source 30 is reflected by the four-sided reflective surface 12 of the first reflector 10, and becomes a flat-shaped radiation ray that strikes the concave reflective surface 22 of the second reflector 20 . Thereafter, the radiation is reflected again by the concave reflecting surface 22 of the second reflector 20, strikes the focal point 26 of the second reflector 20, and enters the target 3 2 placed on the focal point 26. in.

455697 V. Description of the invention (5) Figure 1 is a schematic cross-sectional view of a pair of reflector systems. In a preferred embodiment, the first and second reflectors 10 and 2 are each rotated. parabola. Furthermore, the first reflective surface 12 and the second reflective surface 22 are continuous solid surfaces. As shown in FIG. 1, the source is temporarily introduced into the system, and the focused radiation is taken out of the closed system. The system is quite impractical. Figure 2 shows a practical implementation of the present invention, where the radiation source is an arc lamp 40 placed on the focal point 16 of the first reflector 10, and the target 32 is a wave guide The input end, such as an output fiber 44, is disposed at the focal point 26 of the second reflector 20, along the common optical axes 14 and 24 of the reflectors 10 and 20, respectively. An opening 28 is formed in the second reflector 20, through which the radiation emitted by the lamp 40 enters the area between the opposite reflecting surfaces 12 and 22, and reflects to the reflection of the first reflector 10 Surface 12. The opening 28 is preferably disposed approximately centrally with respect to the optical shafts 14, 24, and the optical shafts 14, 24 extend through the openings 28. The radiation emitted by the arc lamp 40 in the form of a light beam is collected by the first reflector 10, then parallelized 'and directed to the second reflector 20. The light is then 'reflected and focused' or focused by the second reflector, and is placed on the remembrance coin 32 placed on the focal point 26 of the second reflector 20. An opening 18 is formed on the first reflector 10 so that the focused light reflected by the reflecting surface 22 of the second reflector 20 can leave the area between the reflecting surfaces 1 2 '2 2. And incident into the target 32. The opening 18 is preferably placed approximately centrally with respect to the optical axis 1 4, 2 4 and the optical axis 1 4, 2 4 extends through the opening 18. The structure and configuration of the first and second reflectors 10 and 20 should preferably be such that

Page 10 455697 V. Description of the invention (6) The focal points 1 6 and 2 6 are positioned close to the corresponding openings formed in the opposite reflector. A spherical retroreflector 42 can be placed at another measurement of the arc lamp 40, so that the light radiated from this side of the arc lamp 40 can be reflected by the retroreflector 4 2 and return to enter the The arc lamp itself, and then incorporated into the pair of reflectors 10, 20, thereby increasing the overall brightness of the system's output. Suitable lamps include arc lamps such as xenon, metal halides, halogens, or mercury. Although a single output fiber 44 is shown in FIG. 3, the target may include an input end of an output fiber bundle, a homogenizer for outputting high energy to low-temperature plastic fibers, or a homogenizer for projection television. The disadvantages of this actual configuration in FIG. 2 are shown in FIG. 3. In fact, because the opening 18 formed in the first reflector 10 is possible and inevitably larger than the focal point 2 6 of the second reflector 20 and the target 32, emitted by the radiation source 30 The radiation, which is located in the loss cone 46 facing the opening 18, will be lost. As shown in the figure, the opening 18 formed in the first reflector 10 substantially reduces the collecting function of the reflector 10 in this area, and the amount of loss is quite large. FIG. 4 shows the use of a focusing lens 50 between the first and second reflectors 10 and 20, and the loss cone 46 covering the light, which is formed by the openings of the parabolic reflectors 20 and 10, respectively. Loss caused by 2 8, 18 ... The structure of the lens 50 is preferably capable of generating a radiation magnification of 1: 1 on the target located at the focal point 26. In the embodiment shown in FIG. 4, the target

O: \ 64 \ 64973.ptd Page 11 45 56 9 7 Five 'invention description (7) is the input end of a fiber bundle 5 4. The reflectors 10, 20, and 42 and the focusing lens 50 effectively combine substantially all of the light rays radiated by the arc lamp 40 to the target located at the focal point 26. The focusing lens 50 may be a conventional, lenticular lens, and may be made of any material, such as plastic, glass, or quartz. Furthermore, an anti-reflection coating may be applied to the outer surface of the focusing lens 50. Figure 4 shows that the preferred embodiment includes an arc lamp 40 positioned at the opening 28 of the second reflector 20, which is preferably parabolic, a retroreflector 4 2, a focusing lens 50, and a The output fiber bundle 54 has an input end positioned in the opening 18 formed on the first reflector 10, and the first reflector 10 is also preferably a parabolic reflector. The light emitted by the arc lamp 40 is located in the loss cone 46 facing the opening 18, which is collected and focused by the lens 50, and is focused at a single magnification on the The input end of the fiber bundle 54 at the focal point 26. The focusing lens 50 has an optical axis, and it is preferable that the respective optical axes 14 and 24 of the first and second reflectors 10 and 20 coincide, and the first and second reflectors are 1: 1. 10 and 20 individual focal points 16 and 26 are imaged. The remaining part of the light radiated by the arc lamp 40 is collected by the first reflector 10 and the retroreflector 42, and the reflector 10 strikes the second reflector 20 in parallel. The light is then refocused by the second reflector 20 onto the input end of the round fiber bundle 54. The input ends of the arc lamp 40 and the output fiber bundle 54 are respectively placed on the respective focal points 16 and 26 of the first and second reflectors 10 and 20, respectively. To increase the intensity of light incident on the optical target, multiple light sources and reflectors can be cascaded, so that the outputs of the different light sources can be combined and focused.

O: \ 64 \ 64973.ptd Page 12 455697 V. Description of Invention (8) on a single target. This type of system is shown in Figure 5. Figure 5 shows three first, or collection, reflectors 10a, 10b, and 10c with individual focal points 16a, 16b, and 16c, and individual openings 18a, 1 formed therein. 8 b, and 1 8 c. Similarly, the system includes three second, or focusing, reflectors 20a, 20b, and 20c, with individual focal points 26a, 26b, and 2c, and formed therein. Individual openings 2 8 a, 2 8 b, and 2 8 c. Three light sources 30a, 30b, and 3c are positioned at the focal points 16a, 16b, and 16c, respectively. The retroreflector 42 can be used with respect to the first light source 30a. The second and third light sources 3 0 b and 3 0 c are respectively positioned on the focal points 16 b and 16 c of the reflectors 10 b and 10 c. These focal points generally coincide with the intersections 2a and 2b of the reflectors 20a and 20b, respectively. Therefore, the outputs of the light sources 3 a, 3 b, and 3 c located on the common optical axis are combined and finally all the third reflector 2 c is focused on the target 60, as shown in the figure. In an embodiment, the target 60 includes a homogenizer having an input end positioned above the focus. In order to reduce the loss and further increase the intensity on the third focal point 2 6 c, the condenser lenses 50 a, 50 b, and 50 c are respectively positioned at the reflectors 10a, 10b, and 10b along the common optical axis. Between 20b and lDc and 20c. Figure 5 shows a cascaded configuration 'comprising three pairs of reflector groups and three focusing lenses. A cascaded system may also include only two pairs of reflector groups, or more than three pairs of reflector groups < = As shown in Figures 6A-6G, the homogenizer may be circular (Figure 6A) or a polygonal shape. Such as square (Fig. 6B), rectangle (Fig. 6C) 'triangle (Fig. 6D), pentagon (Fig. 6E), hexagon (Fig. 6F), octagon (Fig. 6G) or any other polygon. Moreover, the homogenizer may be made of any suitable material

O: \ 64 \ 64973.pcd Page 13 455697 V. Description of Invention (9) Manufacturing, such as plastic, glass, or quartz. Although the present invention is described by considering the most practical and best embodiment, please also understand that the present invention is not limited to the disclosed embodiment, but on the contrary, it is intended to cover the spirit and scope of the scope of additional patent applications. Contains different variations and equivalents. Therefore, please understand that the specific parameters used to define the present invention can be changed without departing from the novel features of the invention as defined in the scope of subsequent patent applications.

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Claims (1)

4556 9 7 6. Scope of patent application 1. A device includes: a source of electromagnetic radiation; a target illuminated by at least a portion of the electromagnetic radiation emitted by the source;-a collecting reflector with a concave reflective surface and an opening Shaped through it; and a focused reflector having a concave reflecting surface and an opening formed through it, the collection and focusing reflector is positioned and oriented in a relative, facing relationship with its individual concave reflecting surface, the source The positioning and orientation is such that at least a part of the electromagnetic radiation it radiates is transmitted through the opening formed by the focusing reflector, and is directed toward the concave reflecting surface of the collecting reflector, and the collecting reflector Part of the electromagnetic radiation incident thereon is reflected toward the concave reflecting surface of the focusing reflector, and the structure and configuration of the focusing reflector makes at least a part of the electromagnetic radiation reflected by its concave surface focused, and The positioning and orientation of the target passing through the opening formed by passing through the collecting reflector is used for Receiving at least a portion of the focused electromagnetic radiation reflected by the focusing reflector, and transmitting the shaped reflector through the opening of the collecting reflector. 2. The device according to item 1 of the scope of patent application, wherein the concave reflecting surface of the collecting and focusing reflector is parabolic in shape. 3. The device according to item 1 of the patent application scope, wherein the collecting reflector has an optical axis and a focal point is located on the optical axis, and the focusing reflector has an optical axis and a focal point is located on the optical axis, wherein the source is positioned Page 15 455697 6. Scope of patent application Close to the focus of the collecting reflector, and the target is positioned close to the focus of the focusing reflector. 4. The device according to item 3 of the scope of patent application, wherein the optical axes of the collecting reflector and the focusing reflector are completely consistent with each other, and extend through the opening formed by the collecting and focusing reflector. 5. The device according to item 1 of the scope of patent application, further comprising a retroreflector positioned about the source to reflect the source away from the opening formed in the focused reflection, and the reflected radiation is reflected back to The shaping passes through the opening of the focusing reflector. 6. The device according to item 1 of the scope of patent application, further comprising a focusing lens disposed between the collecting and focusing reflector, and the structure and configuration of the focusing lens are used to receive a part of the transmission through the shaping through the focusing reflection The electromagnetic radiation of the opening of the reflector, and focusing the received electromagnetic radiation through the opening of the collecting reflector through the forming. 7. The device according to item 6 of the scope of patent application, wherein the manufacturing material of the focusing lens is selected from the group consisting of plastic, glass, or quartz. 8. The device according to item 6 of the patent application, wherein the focusing mirror is coated with an anti-reflection coating. 9. The device according to item 6 of the scope of patent application, wherein the collecting reflector has an optical axis and a focal point is located on the optical axis, and the focusing reflector has an optical axis and a focal point is located on the optical axis, the collecting and focusing The optical axes of the reflectors are completely consistent with each other, and extend through the opening through the collection and focusing reflector, wherein the focusing lens has Page 16 455697 6. Scope of patent application There is an optical axis, which is completely consistent with the optical axis of the collection and focusing reflector. 10. The device according to item 1 of the scope of patent application, wherein the target includes an input portion of a wave guide. 1 1. The device according to item 10 of the scope of patent application, wherein the wave guide comprises an optical fiber. 1 2. The device according to item 11 of the scope of patent application, wherein the wave guide comprises a plurality of optical fibers and is configured as a fiber bundle. 1 3. The device according to item 10 of the scope of patent application, wherein the wave guide comprises a homogenizer. 14. The device according to item 13 of the scope of patent application, wherein the homogeneous implement has a circular cross-sectional profile. 1 5. The device according to item 13 of the scope of patent application, wherein the homogeneous implement has a polygonal cross-sectional profile. 16. The device according to item 15 of the scope of patent application, wherein the homogenizer has an outer shape selected from the group consisting of a triangle, a rectangle, a pentagon, a hexagon, and an octagon. 1 7. The device according to item 1 of the scope of patent application, wherein the electromagnetic radiation source includes an arc lamp d 1 8. The device according to item 17 of the scope of patent application, wherein the source includes an electric solitary lamp, which is composed of Selected from the group consisting of gas, metallization, II, or mercury electric solitary lamps. 19. The device according to item 6 of the scope of patent application, further comprising: at least one additional collection reflector and a corresponding number of additional focus reflectors, each of the additional collection and focus reflectors having an open channel Page 17 45 56 9 7 6. The scope of the patent application has been formed. The collection and focusing reflectors are arranged on the common optical axis of one of the paired collection-focusing reflectors; at least one external electromagnetic radiation source , So that the total number of electromagnetic radiation sources corresponds to the total number of collection-focus reflector pairs; and at least one additional focusing lens, such that the total number of focus lenses corresponds to the total number of collection-focus reflector pairs Correspondingly, each of the focusing lenses is disposed in an associated pair of the collecting-focusing reflectors, between the opposing collecting and focusing reflectors. 2 0. A device for collecting radiation emitted by an electromagnetic radiation source and focusing the collected radiation on a target, the device includes: a first reflector, a reflective surface having a concave surface, and an opening through Formed therein; and a second reflector having a concave reflective surface and an opening formed therethrough, the collection and focusing reflector is positioned and oriented in a relative, facing relationship with its individual concave reflective surface, the first The two reflectors are positioned with respect to the first reflector such that at least a portion of the emitted electromagnetic radiation is transmitted through the opening to the first reflector by positioning close to a source that is shaped through the opening of the second reflector. A concave reflective surface of a reflector, and the structure and configuration of the first reflector are configured to reflect at least a portion of the electromagnetic radiation incident thereon to the concave reflective surface of the second reflector, And the first reflector is positioned with respect to the second reflector such that at least the electromagnetic radiation reflected by the reflective surface of the concave surface of the second reflector is Department O: \ 64 \ 54973.ptd Page 18 455697 6. The scope of the patent application is transmitted through the opening of the first reflector through the forming, and is directed toward a target, which is positioned close to the shape of the first reflector. The opening, the structure and configuration of the second reflector, is used to focus at least a part of the electromagnetic radiation incident on the reflective surface of its concave surface through the opening that passes through the first reflector and is directed toward the aims. 2 1. The device according to item 20 of the scope of patent application, wherein the concave and reflective surfaces of the first and second reflectors are parabolic in shape. 2 2. The device according to item 20 of the scope of patent application, wherein the first reflector has an optical axis and a focal point is located on the optical axis, and the second reflector has an optical axis and a focal point is located on the optical axis, The optical axes of the first and second reflectors are completely identical and extend through the individual openings formed by the first and second reflectors. 2 3. The device according to item 22 of the scope of patent application, wherein the focal point of the first reflector is positioned close to the opening formed in the second reflector, and the focal point of the second reflector is positioned close to The opening formed in the second reflector. 2 4. The device according to item 20 of the scope of patent application, further comprising a focusing lens disposed between the first and second reflectors. The structure and configuration of the focusing lens are used for receiving and transmitting through the forming and passing through the first Part of the electromagnetic radiation of the opening of the two reflectors, and focusing the received electromagnetic radiation through the opening formed in the first reflector. 25. The device according to item 24 of the scope of patent application, wherein the first reflector has an optical axis and a focal point is located on the optical axis, and the second reflector has an optical axis and a focal point is located on the optical axis, The first and the first O: \ 64 \ 64973.ptd Page 19 455697 Six 'patent application scope The optical axes of the two reflectors are completely consistent with each other and extend through the openings formed through the first and second reflectors, and The focusing lens has an optical axis, which is completely consistent with the optical axis system of the first and second reflectors. 26. A device comprising:-a source of electromagnetic radiation; a target illuminated by at least a portion of the electromagnetic radiation emitted by the source; a first reflector having a concave reflective surface and an opening formed therethrough; A second reflector having a concave reflecting surface and an opening formed therethrough, the first and second reflectors are positioned and oriented in a relative, facing relationship with their respective concave reflecting surfaces, and the positioning of the source and Oriented so that at least a part of the electromagnetic radiation it radiates is transmitted through the opening formed by the second reflector to the concave reflective surface of the first reflector, and the first reflector will at least partially The electromagnetic radiation incident on it is reflected toward the reflective surface of the concave surface of the second reflector, and the second reflector is positioned and oriented so that at least a part of the electromagnetic radiation reflected by the concave surface is focused And pass through the opening formed by the first reflector, the positioning and orientation of the target is used to receive at least a part of the second reflector The emission of the electromagnetic radiation has the focus, and transmits through the shaped through the opening of the first reflector; the focusing and a focusing lens disposed between the first and second reflector, O: \ 64 \ 54973.ptd Page 20 455697 6. The structure and configuration of the patent application lens are used to receive a portion of the electromagnetic radiation transmitted through the opening formed by the second reflector, and to receive the received electromagnetic The radiation is focused through the opening formed in the first reflector and is directed toward the target. -2 7. The device according to item 26 of the scope of patent application, wherein the concave reflective surfaces of the first and second reflectors are parabolic in shape. 28. The device according to item 26 of the scope of patent application, wherein the first reflector has an optical axis and a focal point is located on the optical axis, and the second reflector has an optical axis and a focal point is located on the optical axis, The optical axes of the first and second reflectors are completely consistent with each other, and extend through the openings formed through the first and second reflectors, and wherein the focusing lens has an optical axis, which is in line with the The optical axes of the first and second reflectors are completely identical. Page 21