CN101191903A - Three-color light color-combination combined prism with high high-reflection film - Google Patents
Three-color light color-combination combined prism with high high-reflection film Download PDFInfo
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Abstract
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.
Description
Technical field
The present invention relates to a kind of three-color light color-combination combined prism that has high-reflecting film, belong to photoelectric lighting and technique for displaying field.
Background technology
Existing three coloured light X type colour-mixing combined prisms, the X combined prism of a square bodily form of employing, there is the filter coating of two quadratures the centre.See Fig. 1.Now closing look with red, green, blue three coloured light, to become white light be that example illustrates it.Filter coating f1 reflect blue sees through red, green glow; Filter coating f2 reflect red sees through blue, green glow.Hot, green, blue three color light is injected the X combined prism from the plane of incidence separately respectively, through transmission and the reflection of filter coating f1 and f2, closes look and becomes the white light outgoing.In the X of background technology combined prism, red, green, blue three coloured light all are each the self-corresponding filter coatings of incident angle difference directive with 45 °, and big like this incident angle is brought very big difficulty to the making of filter coating, and it is less that filter coating can be used relative aperture.In addition, the X combined prism is formed by four right-angle prism gummeds, and manufacture craft is strict, the cost height.
Summary of the invention
The objective of the invention is to propose a kind of three-color light color-combination combined prism that has high-reflecting film.Three coloured light are with the filter coating separately in less this combined prism of incident angle directive.This combined prism has easy to make, the advantage such as cost is low, applicable relative aperture is bigger of closing colour efficiency height, filter coating.
For achieving the above object, the present invention adopts following technical scheme.
Constitute the combined prism that the bottom surface is the straightedge column of external two isosceles triangles of rectangle by six prisms, two-layer filter coating and two-layer high-reflecting film, all faces of this combined prism all are polished surfaces, two-layer filter coating intersects in this combined prism mutually, angle is 60 °, first filter coating reflects first coloured light, see through second, third coloured light, second filter coating reflects the 3rd coloured light, see through first, second coloured light, on the medial surface of the right prism that it is isosceles triangle that two-layer high-reflecting film is plated in two bottom surfaces respectively.The lateral surface of the right prism that three coloured light are isosceles triangle from two bottom surfaces respectively and bottom surface are that a lateral surface of the right prism of rectangle is injected this combined prism, after the reflection and transmission through filter coating and high-reflecting film, become and close another lateral surface outgoing that coloured light is the right prism of rectangle from the bottom surface.
Now describe technical scheme of the present invention in conjunction with the accompanying drawings in detail.
A kind of three-color light color-combination combined prism that has high-reflecting film, it is characterized in that, contain first prism 11, second prism 12, prism 13, the 4th prism 14, pentaprism 15, the 6th prism 16, first filter coating 17, second filter coating 18, first high-reflecting film 19 and second high-reflecting film 20, there are four in described six prisms: first prism 11, prism 13, pentaprism 15 and the 6th prism 16 are for identical isosceles prism and have two: second prism 12 is identical positive prism with the 4th prism 14, the drift angle of isosceles prism bottom surface is 120 °, the waist long length of side with positive prism bottom surface in isosceles prism bottom surface equates, the height of described four prisms equates, first filter coating, 17 reflections, first coloured light, see through second, the 3rd coloured light, second filter coating, 18 reflections the 3rd coloured light, see through first, second coloured light, first filter coating 18 and second filter coating 19 are that 60 ° mode intersects with angle, first high-reflecting film, 19 reflections, first coloured light, second high-reflecting film, 20 reflections the 3rd coloured light, first central plane such as grade 212 and C grade central plane 232 respectively with central plane 222 such as second and fourth class central plane 242 gummeds, on two sections cemented surfaces that form first filter coating 17 is arranged, the 5th central plane such as grade 213 and central plane 233 such as the 7th respectively with central plane 223 gummeds such as central plane 243 such as the 6th and the 8th, on two sections cemented surfaces that form second filter coating 18 is arranged, on the 9th central plane such as grade 2501 and the central plane 2601 such as the tenth first high-reflecting film 19 and second high-reflecting film 20 are arranged respectively, the tenth first-class central plane 2502 and the tenth second-class central plane 2602 respectively with first bottom surface 221 and 241 amalgamations of second bottom surface, can there be air-gap the mosaic of described two amalgamations or have air-gap, air-gap thickness is 0mm～5mm, the plane of incidence of three three coloured light is respectively the 3rd bottom surface 251, the 4th bottom surface 211, the 5th bottom surface 261, the exit facet that closes coloured light is the 6th bottom surface 231, all faces of described combined prism all are polished surfaces, described prism, it is the described combined prism of the straightedge column of external two isosceles triangles of rectangle that filter coating and high-reflecting film constitute the bottom surface.See Fig. 2.
Technical scheme of the present invention is further characterized in that, being connected between the tenth first-class central plane 2502 and first bottom surface 221 and the tenth second-class central plane 2602 and second bottom surface 241 is splicing.
Technical scheme of the present invention is further characterized in that, second prism 12 and pentaprism 15 are combined into one through the tenth first-class central plane 2502 and first bottom surface 221, and the 4th prism 14 and the 6th prism 16 are combined into one through the tenth second-class central plane 2602 and second bottom surface 241.
Technical scheme of the present invention is further characterized in that the centre wavelength of 50% transmitance correspondence of first filter coating 17 is 585nm ± 3nm, and the centre wavelength of 50% transmitance correspondence of second filter coating 18 is 500nm ± 3nm.
Technical scheme of the present invention is further characterized in that first filter coating 17 and second filter coating 18 are depolarization filter coatings.
Compare with background technology, the present invention has following advantage:
1, the utilization ratio of optical energy height of three coloured light
Three coloured light all are with 45 ° of incident angle directives filter coating separately in the existing X-prism color device, make the difficulty height of such filter coating, have limited the minimizing of F numerical value, have limited the utilization ratio of optical energy of three coloured light.Three coloured light all are with 30 ° of incident angle directives filter coating separately among the present invention, have reduced the difficulty of making filter coating, have reduced the numerical value of F number, have improved the utilization factor of three coloured light luminous energies.
2, color-combination prism of the present invention utilizes the internal reflection of high-reflecting film, guarantees that in communication process light with small incident directive filter coating, has shortened the light path of green glow simultaneously, has improved the utilization factor of green glow luminous energy.
3, three coloured light all are with 30 ° of incident angle directives filter coating separately among the present invention, and first filter coating 17 and second filter coating 18 become the depolarization filter coating than background technology is easier.
Description of drawings
Fig. 1 is the structural representation of three coloured light X-prism color devices.
Fig. 2 is the structural representation of three coloured light color-combination prisms.
Fig. 3 is the perspective view of three coloured light color-combination prisms.
Fig. 4 is the decomposition texture synoptic diagram of three coloured light color-combination prisms.
Fig. 5 be red, green, blue three coloured light color-combination prisms close coloured light road synoptic diagram.
Fig. 6 is the spectral transmittance curve synoptic diagram of first filter coating 17 in the three coloured light color-combination prisms.
Fig. 7 is the spectral transmittance curve synoptic diagram of second filter coating 18 in the three coloured light color-combination prisms.
Embodiment
Now describe technical scheme of the present invention in conjunction with the accompanying drawings and embodiments in detail.
One of embodiment 1 colour-mixing combined prism.The combined prism of present embodiment has and the identical structure of combined prism mentioned above, and its key technical indexes is enumerated as follows:
The isosceles triangle bottom side length is 8.66mm, and waist is long to be 5mm;
The equilateral triangle length of side is 5mm, and prism height is 14.6mm;
The centre wavelength of 50% transmitance correspondence of first filter coating 17 is 585nm ± 3nm;
The centre wavelength of 50% transmitance correspondence of second filter coating 18 is 500nm ± 3nm.
The spectral transmittance characteristic of first filter coating 17 and second filter coating 18 is seen Fig. 5 and Fig. 6.
The principle of work of present embodiment.Suppose that in the color-combination prism of embodiment 1 first coloured light, second coloured light and the 3rd coloured light are respectively blue light, green glow, ruddiness, three coloured light incide each self-corresponding filter coating with 30 ° incident angle respectively.The plane of incidence of blue light, green glow, ruddiness is respectively the 3rd bottom surface 251, the 4th bottom surface 211, the vertical plane of incidence incident separately of the 5th bottom surface 261, three coloured light, and the exit facet that closes the coloured light white light is the 6th bottom surface 231.Be divided into two parts G1 from the green glow of the 4th bottom surface 211 incidents, G2, the G1 part sees through first filter coating 17 earlier, see through second filter coating 18 again from 231 outgoing of the 6th bottom surface, G2 sees through second filter coating 18 earlier, see through first filter coating 17 again from 231 outgoing of the 6th bottom surface, disperse green glow be mapped to first bottom surface 221 and second bottom surface 241, because incident angle is greater than the cirtical angle of total reflection, total reflection takes place on described two interfaces, see through first filter coating 17 and second filter coating 18 respectively, from 231 outgoing of the 6th bottom surface, thereby increased the luminous energy of green glow, improved the utilization factor of green glow.Be divided into two parts B1 and B2 from the blue light of the 3rd bottom surface 251 incidents, the B1 part incides on first high-reflecting film 19 with 30 ° of incident angles, reflexed to the 3rd bottom surface 251 by first high-reflecting film 19, incident angle is 60 °, greater than the cirtical angle of total reflection, and the inside surface reflection in the 3rd bottom surface 251, be mapped on first filter coating 17, by 17 reflections of first filter coating, and see through second filter coating 18, from 231 outgoing of the 6th bottom surface; The B2 part incides on second filter coating 18 with 30 ° of incident angles, see through second filter coating 18, be mapped to the inside surface of the 6th bottom surface 231, with incident angle is 60 °, greater than the cirtical angle of total reflection, the inside surface reflection in the 6th bottom surface 231 is mapped on first filter coating 17, by 17 reflections of first filter coating, from 231 outgoing of the 6th bottom surface.Ruddiness from 261 incidents of the 5th bottom surface, be divided into two parts R1, R2, the R1 part incides on the second interior anti-film 20 with 30 ° of incident angles, reflexed to the 5th bottom surface 261 by the second interior anti-film 20, incident angle is 60 °, greater than the cirtical angle of total reflection, inside surface reflection in the 5th bottom surface 261, be mapped on second filter coating 18,, and see through first filter coating 17 by 18 reflections of second filter coating, incide on first filter coating 17 with 30 ° of incident angles from the 6th bottom surface 231 outgoing R2 part, see through first filter coating 17, in the inside surface reflection of the 6th bottom surface 231, incident angle is 60 °, greater than the cirtical angle of total reflection, inside surface reflection in the 6th bottom surface 231 is after 18 reflections of second filter coating, from 231 outgoing of the 6th bottom surface.Therefore,, under the effect of first filter coating, 17, the second filter coatings, 18, the first and second high-reflecting films 19,20, close look and become white light,, realized the look that closes of three coloured light from the 6th bottom surface 231 outgoing of three-color light color-combination combined prism from three coloured light of three plane of incidence incidents.
Two of embodiment 2 colour-mixing combined prisms.The present embodiment difference from Example 1 is: second prism 12 and pentaprism 15 are integrated, and the 4th prism 1 and the 6th prism 16 are integrated, and constitute right-angle prism respectively.
The key technical indexes of the described combined prism of present embodiment: the isosceles triangle bottom side length is 8.66mm, and waist is long to be 5mm, and the right-angle triangle right angle length of side is 5mm, and 8.66mm, prism height are 14.6mm; The centre wavelength of 50% transmitance correspondence of first filter coating 17 is 585nm ± 3nm; The centre wavelength of 50% transmitance correspondence of second filter coating 18 is 500nm ± 3nm, and the spectral transmittance characteristic of first filter coating 17 and second filter coating 18 is seen Fig. 6 and Fig. 7.
The principle of work of present embodiment.The ruddiness of the propagation condition of ruddiness and blue light and embodiment 1 is identical with the propagation condition of blue light, and the difference of the propagation condition of the propagation condition of green glow and embodiment 1 green glow is:
Be divided into G1, G2 two parts from the green glow of the 4th bottom surface 211 incidents, the G1 part sees through first filter coating 17 earlier, sees through second filter coating 18 again, from 231 outgoing of the 6th bottom surface; The G2 part sees through second filter coating 18 earlier, sees through first filter coating 17 again, from 231 outgoing of the 6th bottom surface.When the green glow of dispersing is mapped to first bottom surface 211 and second bottom surface 241, owing to there is not an air-gap, can not total reflection and scatter and disappear, dispersing green glow can not be from 231 outgoing of the 6th bottom surface.
One of embodiment 3 colour-mixing combined prisms, first filter coating 17 of present embodiment transposing embodiment 1 and the position of second filter coating 18, the position of the transposing green glow plane of incidence and white light exit facet; See Fig. 6, the key technical indexes of the described combined prism of present embodiment: the isosceles triangle bottom side length is 8.66mm, and waist is long to be 5mm, and the equilateral triangle length of side is 5mm, and prism height is 14.6mm; The centre wavelength of 50% transmitance correspondence of first filter coating 17 is 585nm ± 3nm; The centre wavelength of 50% transmitance correspondence of second filter coating 18 is 500nm ± 3nm, and the spectral transmittance characteristic of first filter coating 17 and second filter coating 18 is seen Fig. 6 and Fig. 7.
Principle of work.Suppose that in above-mentioned color-combination prism first coloured light, second coloured light and the 3rd coloured light are respectively blue light, green glow, ruddiness, three coloured light incide each self-corresponding filter coating with 30 ° incident angle respectively.The plane of incidence of blue light, green glow, ruddiness is respectively the 3rd bottom surface 251, the 6th bottom surface 231, the vertical plane of incidence incident separately of the 5th bottom surface 261, three coloured light, and the exit facet that closes the coloured light white light is the 4th bottom surface 211.On two filter coatings, all keep seeing through from the green glow of the 6th bottom surface 231 incidents, according to the light-beam position difference, exceed with center line, be divided into G1, G2, the sequencing difference, G1 sees through first filter coating 17 earlier, seeing through second filter coating 18 again penetrates from exit facet 211, G2 sees through second filter coating 18 earlier, see through first filter coating 17 again and penetrate from exit facet 211, disperse green glow be mapped to first bottom surface 221 and second bottom surface 241, owing to the critical angle of incident angle greater than total reflection, total reflection takes place on described two interfaces, from exit facet 211 outgoing, increased the luminous energy of green glow, help to improve the utilization factor of green glow.From 251 the incident blue lights in the 3rd bottom surface, be divided into two parts B1 and B2 according to center line P1, the B1 part blue light of incident, incide on first high-reflecting film 19 with 30 ° of incident angles earlier, reflexed to the blue light plane of incidence 251 by first high-reflecting film 19, incident angle is 60 °, satisfy total reflection condition, the inside surface reflection in the 3rd bottom surface 251 is incided on second filter coating 18, after seeing through second filter coating 18, be mapped to the inside surface of exit facet 211 with 60 ° of incident angles, satisfy total reflection condition, in the inside surface total reflection of exit facet 211, reflection ray penetrates from exit facet 211 after 17 reflections of first filter coating; The B2 part blue light of incident incides on first filter coating 17 with 30 ° of incident angles earlier, and reflection is incided on second filter coating 18 then, through behind second filter coating 18, penetrates from exit facet 211.From 261 the incident ruddiness in the 5th bottom surface, be divided into two parts R1 and R2 according to center line P2, the R1 part ruddiness of incident, incide on the second interior anti-film 20 with 30 ° of incident angles earlier, reflexed to the plane of incidence by the second interior anti-film 20, incident angle is 60 degree, satisfy total reflection condition,, incide on first filter coating 17 in the interior surfaces of glass reflection of the plane of incidence, after seeing through first filter coating 17, be mapped to the inside surface of exit facet 211 with 60 ° of incident angles, satisfy total reflection condition, in the inside surface total reflection of exit facet 231, reflection ray penetrates from exit facet 211 after 18 reflections of second filter coating; The R2 part ruddiness of incident incides on second filter coating 18 with 30 ° of incident angles earlier, and reflection is incided on first filter coating 17 then, sees through first filter coating, 17 backs and penetrates from exit facet 211.Therefore, from three coloured light of three plane of incidence incidents, at first filter coating 17, under the effect of second filter coating, 18, the first and second high-reflecting films 19,20, close the form ejaculation that look becomes white light from the coloured light exit facet 211 that closes of three-color light color-combination combined prism, realized the look that closes of three coloured light.
Color-combination prism of the present invention is particularly suitable for being used in the display system such as LCD, DLP, LCOS, uses as closing the look illumination.
Claims (9)
1. three-color light color-combination combined prism that has high-reflecting film, it is characterized in that, contain first prism (11), second prism (12), prism (13), the 4th prism (14), pentaprism (15), the 6th prism (16), first filter coating (17), second filter coating (18), first high-reflecting film (19) and second high-reflecting film (20), there are four in described six prisms: first prism (11), prism (13), pentaprism (15) and the 6th prism (16) for identical isosceles prism with have two: second prism (12) is identical positive prism with the 4th prism (14), the drift angle of isosceles prism bottom surface is 120 °, the waist long length of side with positive prism bottom surface in isosceles prism bottom surface equates, the height of described four prisms equates, first filter coating (17) reflection, first coloured light, see through second, the 3rd coloured light, second filter coating (18) reflection the 3rd coloured light, see through first, second coloured light, first filter coating (18) and second filter coating (19) are that 60 ° mode intersects with angle, first high-reflecting film (19) reflection, first coloured light, second high-reflecting film (20) reflection the 3rd coloured light, first central plane such as grade (212) and C grade central plane (232) respectively with central plane (222) such as second and fourth class central plane (242) gummed, on two sections cemented surfaces that form first filter coating (17) is arranged, the 5th central plane such as grade (213) and central plane (233) such as the 7th respectively with central plane (223) gummeds such as central plane (243) such as the 6th and the 8th, on two sections cemented surfaces that form second filter coating (18) is arranged, on the 9th central plane such as grade (2501) and the central plane (2601) such as the tenth first high-reflecting film (19) and second high-reflecting film (20) are arranged respectively, the tenth first-class central plane (2502) and the tenth second-class central plane (2602) respectively with first bottom surface (221) and second bottom surface (241) amalgamation, can there be air-gap the mosaic of described two amalgamations or have air-gap, air-gap thickness is 0mm～5mm, the plane of incidence of three three coloured light is respectively the 3rd bottom surface (251), the 4th bottom surface (211), the 5th bottom surface (261), the exit facet that closes coloured light is the 6th bottom surface (231), all faces of described combined prism all are polished surfaces, described prism, it is the described combined prism of the straightedge column of external two isosceles triangles of rectangle that filter coating and high-reflecting film constitute the bottom surface.
2. the three-color light color-combination combined prism that has high-reflecting film according to claim 1 is characterized in that, being connected between the tenth first-class central plane (2502) and first bottom surface (221) and the tenth second-class central plane (2602) and second bottom surface (241) is splicing.
3. the three-color light color-combination combined prism that has high-reflecting film according to claim 1, it is characterized in that, second prism (12) is combined into one through the tenth first-class central plane (2502) and first bottom surface (221) with pentaprism (15), and the 4th prism (14) is combined into one through the tenth second-class central plane (2602) and second bottom surface (241) with the 6th prism (16).
4. the three-color light color-combination combined prism that has high-reflecting film according to claim 1, it is characterized in that, the centre wavelength of 50% transmitance correspondence of first filter coating (17) is 585nm ± 3nm, and the centre wavelength of 50% transmitance correspondence of second filter coating (18) is 500nm ± 3nm.
5. the three-color light color-combination combined prism that has high-reflecting film according to claim 1 is characterized in that, first filter coating (17) and second filter coating (18) are the depolarization filter coatings.
6. the three-color light color-combination combined prism that has high-reflecting film according to claim 1, it is characterized in that, being connected between the tenth first-class central plane (2502) and first bottom surface (221) and the tenth second-class central plane (2602) and second bottom surface (241) is splicing, the centre wavelength of 50% transmitance correspondence of first filter coating (17) is 585nm ± 3nm, and the centre wavelength of 50% transmitance correspondence of second filter coating (18) is 500nm ± 3nm.
7. the three-color light color-combination combined prism that has high-reflecting film according to claim 1, it is characterized in that, being connected between the tenth first-class central plane (2502) and first bottom surface (221) and the tenth second-class central plane (2602) and second bottom surface (241) is splicing, and first filter coating (17) and second filter coating (18) are the depolarization filter coatings.
8. the three-color light color-combination combined prism that has high-reflecting film according to claim 1, it is characterized in that, second prism (12) is combined into one through the tenth first-class central plane (2502) and first bottom surface (221) with pentaprism (15), the 4th prism (14) is combined into one through the tenth second-class central plane (2602) and second bottom surface (241) with the 6th prism (16), the centre wavelength of 50% transmitance correspondence of first filter coating (17) is 585nm ± 3nm, and the centre wavelength of 50% transmitance correspondence of second filter coating (18) is 500nm ± 3nm.
9. the three-color light color-combination combined prism that has high-reflecting film according to claim 1, it is characterized in that, second prism (12) is combined into one through the tenth first-class central plane (2502) and first bottom surface (221) with pentaprism (15), the 4th prism (14) is combined into one through the tenth second-class central plane (2602) and second bottom surface (241) with the 6th prism (16), and first filter coating (17) and second filter coating (18) are the depolarization filter coatings.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101188899A CN100514119C (en) | 2006-11-29 | 2006-11-29 | Three-color light color-combination combined prism with high high-reflection film |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101188899A CN100514119C (en) | 2006-11-29 | 2006-11-29 | Three-color light color-combination combined prism with high high-reflection film |
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| CN101191903A true CN101191903A (en) | 2008-06-04 |
| CN100514119C CN100514119C (en) | 2009-07-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044808A (en) * | 2015-08-05 | 2015-11-11 | 苏州华徕光电仪器有限公司 | Multi-reflection micro-structure surveying and mapping prism |
| CN106646699A (en) * | 2017-03-09 | 2017-05-10 | 索尔思光电（成都）有限公司 | Prism and light transmit-receive assembly |
| CN110376669A (en) * | 2018-04-13 | 2019-10-25 | 甘肃智呈网络科技有限公司 | A kind of cube Amici prism |
| CN114252943A (en) * | 2022-01-26 | 2022-03-29 | 深圳市科金明电子股份有限公司 | Prism unit and projection device using the same |
-
2006
- 2006-11-29 CN CNB2006101188899A patent/CN100514119C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044808A (en) * | 2015-08-05 | 2015-11-11 | 苏州华徕光电仪器有限公司 | Multi-reflection micro-structure surveying and mapping prism |
| CN106646699A (en) * | 2017-03-09 | 2017-05-10 | 索尔思光电（成都）有限公司 | Prism and light transmit-receive assembly |
| CN110376669A (en) * | 2018-04-13 | 2019-10-25 | 甘肃智呈网络科技有限公司 | A kind of cube Amici prism |
| CN114252943A (en) * | 2022-01-26 | 2022-03-29 | 深圳市科金明电子股份有限公司 | Prism unit and projection device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100514119C (en) | 2009-07-15 |
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