CN100337098C - Method for manufacturing optical integrating ball - Google Patents
Method for manufacturing optical integrating ball Download PDFInfo
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- CN100337098C CN100337098C CNB2003101061945A CN200310106194A CN100337098C CN 100337098 C CN100337098 C CN 100337098C CN B2003101061945 A CNB2003101061945 A CN B2003101061945A CN 200310106194 A CN200310106194 A CN 200310106194A CN 100337098 C CN100337098 C CN 100337098C
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Abstract
The present invention discloses a method for manufacturing an optical integrating sphere, which comprises the steps that polytetrafluoroethylene powder (1) is filled between the hemispherical inner wall of a hemispherical casing (2) of the integrating sphere and a hemispherical inner mould (3); more than one extrusion mould (4) makes a circular arc movement between the hemispherical inner mould (3) and the hemispherical inner wall of the hemispherical casing (2) of the integrating sphere around an axis (M) through of center of a circle (O) on the plane of the hemispherical inner mould (3) by opening processing and joint processing after the polytetrafluoroethylene powder is pressed; the polytetrafluoroethylene powder (1) is extruded, and the pressure intensity is from 0.5 kg/cm<2> to 50 kg/cm<2>; the extrusion moulds (4) rotate around the normal line (N) through the center of a circle (O) on the plane of the hemispherical inner mould (3) to regulate the pressing orientation; the polytetrafluoroethylene powder (1) is filled once again after the pressure is gradually increased and the extrusion is repeated to reach the required density, and then the extrusion process is repeated to prepare a hemispherical casing reflecting layer (7) having the density of 0.8 to 1.8 g/cm<3>. The integrating sphere manufactured by the method can be suitable for various purposes.
Description
Technical field the present invention relates to a kind of method for making of optical element, especially the method for making of optical integration ball.
Background technology optical integration ball is widely used in the various aspects that relate to spectral luminosity and radiometry in the fields such as illumination, remote sensing, building, photography, chemical analysis, weaving.And the density uniformity in integrating sphere inwall reflection horizon, geometric configuration, reflectivity, lambert's property, physicochemical property etc. directly influence the key quality and the results of use such as surface uniformity, lambert's property, spoke out-degree and stability of integrating sphere.Teflon has good optical characteristics and physicochemical property, is that the optical integration ball in reflection horizon has more widespread use field and using value with it.But mobile difference of teflon and geometric surface shape are difficult to characteristics such as making, do not have satisfied global formation to make the method for teflon integrating sphere, the method for making of especially industrial quality so far as yet.
" reflectivity of compacting polytetrafluorethylepowder powder " literary composition once disclosed with " compacting " head and had progressively suppressed polytetrafluorethylepowder powder formation reflection horizon in " Optical Society of America " the 71st volume the 7th phase magazine of publishing in July, 1981; ; polytetrafluorethylepowder powder is when forming first sample with craft, and its uniformity consistency can not guarantee that " compacting " progressively carried out on the working surface of reflection horizon; will stay the vestige of " compacting " head, these all can influence the quality in reflection horizon and the result of use of integrating sphere.
No. 85200717 described a kind of integrating spheres of Chinese patent; Directly polytetrafluorethylepowder powder is pressed into profile for square, inner be semicircular two hemispheres, again that two hemisphere is involutory and make integrating sphere.This integrating sphere is owing to being that directly compacting gets, and incomparable inconsistent inside and outside shape makes its density control and homogeneity be difficult to be guaranteed the nonuniformity of wall thickness.Some position thickness low LCL of spheroid and influence result of use, also can be because of the density at some position loose and do not have the protection of high strength shell make its use or transportation in also very easily be damaged.
Summary of the invention the invention solves above-mentioned technical matters, provides a kind of making to have the method for making of industrial quality optical integration ball.
The technical scheme that is adopted comprises polytetrafluorethylepowder powder is filled between the semisphere inwall and semisphere internal mold of integrating sphere hemisphere shell, opening, involutory is carried out to it in repressed back, particularly use an above extrusion die, on semisphere internal mold plane, cross the axis in the center of circle, between the semisphere inwall of semisphere internal mold and integrating sphere hemisphere shell, do circular motion, polytetrafluorethylepowder powder between the semisphere inwall that is filled in semisphere internal mold and integrating sphere hemisphere shell is pushed, and its pressure is 0.5kg/cm
2～50kg/cm
2After finishing the compacting in an orientation, extrusion die is crossed an angle of normal rotation in the center of circle around semisphere internal mold plane, repeat above-mentioned extrusion process until rotating a circle, progressively pressure boost repeats above-mentioned extrusion process after reaching required density, filled polytetrafluoroethylene powder once more, and to repeat above-mentioned extrusion process be 0.8g/cm until making density
3～1.8g/cm
3Hemisphere housing reflection horizon.
Further improvement as technical scheme, described extrusion die is the equal thickness curved body, the radius of its negative camber radius 〉=hemisphere internal mold, the inside radius of the semisphere inwall of positive camber radius≤integrating sphere hemisphere shell, the pairing central angle of arc length is between 30～150 degree, and width is 1/100～1/2 of an extrusion die mean radius of curvature; Have pressure indicator on the described extrusion die; 1/3 of the amount of inserting of the once amount of inserting of described polytetrafluorethylepowder powder≤always; Concentric and two hemispheres section is same plane to described integrating sphere hemisphere shell with the semisphere internal mold, and the difference of its radius-of-curvature is 5～50mm.
Beneficial effect with respect to prior art is, one, because to polytetrafluorethylepowder powder compacting is to wait between the inside and outside mould in gap and carrying out in a definite pressure limit, so the wall thickness in integrating sphere reflection horizon all is consistent with density, its inwall working surface radius-of-curvature also is consistent, this had both improved the accuracy of integrating sphere reflection with outgoing homogeneity, measuring system, had reduced systematic error, had improved the efficient of integrating sphere again effectively.After tested, reflectivity brings up to 99% from 95%, and the efficient of integrating sphere has improved about 5.2 times (integrating sphere efficient M=ρ/(1-ρ), wherein, ρ is a reflectivity), and then improved signal intensity and signal to noise ratio (S/N ratio), make whole optics accuracy of measurement system be improved; Its two owing to make the difficulty in teflon reflection horizon, the major diameter integrating sphere generally adopts barium sulphate coating to make, its spoke brightness output is not very high, especially long-time stability are difficult to keep, and have influenced effect.Adopt this method, can make large diameter polytetrafluoroethylore reflection horizon integrating sphere, opened up the technology path for making high-performance major diameter integrating sphere; Its three, pure polytetrafluorethylepowder powder global formation is adopted in the reflection horizon of integrating sphere, does not contain volatile matter such as bonding agent, compares with coating integrating spheres such as barium sulphate, can bear higher temperature, can be used for not having the optical measurement under the vacuum environment condition of atmospheric interference; Its four, the integrating sphere integral body that makes is solid and reliable, the shell of adapted has strengthened the ability of outside destroy such as integrating sphere opposing accident collision or vibrations.The invention solves and make all restrictions that the integrating sphere quality can not get guaranteeing in the past, thereby opened up new prospect in each field of national economy, relating to aspect luminosity and the radiometry application.
Description of drawings is described in further detail optimal way of the present invention below in conjunction with accompanying drawing.
Fig. 1 realizes employed a kind of mould and using method thereof synoptic diagram when of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is a kind of diagrammatic cross-section of finishing the integrating sphere of making.
Referring to Fig. 1, Fig. 2, Fig. 3.Semisphere internal mold 3 and the interior diameter that with diameter is 50 millimeters is that 62 millimeters the semisphere inwall of metal integrating sphere hemisphere shell 2 is concentric, and the difference of both radius-of-curvature is 6 millimeters of reflector thickness to be processed.Taking by weighing the trade mark is the polytetrafluorethylepowder powder 1 of Lufs-4s-01 (or granularity is 10 microns～250 microns), and its weight is that (the about 30g of general assembly (TW) in hemisphere housing reflection horizon, density is 1g/cm to 8g
3), insert between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2 and shake up.With two extrusion dies 4, pressure with 0.2kg, on semisphere internal mold 3 planes, cross the axis M of center of circle O, between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2, do circular motion, polytetrafluorethylepowder powder between the semisphere inwall that is filled in semisphere internal mold 3 and integrating sphere hemisphere shell 21 is done extruding in opposite directions, after finishing the compacting in an orientation, extrusion die 4 is crossed angle of normal N rotation of center of circle O around semisphere internal mold 3 planes, with above-mentioned same pressure and mode polytetrafluorethylepowder powder 1 is pushed, finish after the compacting in one week of 3 planes of semisphere internal mold, progressively pressure boost is to 1g/cm
3The pairing pressure of density repeats above-mentioned pressing process.After finishing this round reflection horizon compacting, between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2, insert polytetrafluorethylepowder powder 1 more as one feels fit, repeat said process, until the making of finishing hemisphere housing reflection horizon.Wherein, the circular arc heart of extrusion die 4 is concentric with semisphere internal mold 3, has pressure indicator on it, and width and thickness are 5.8 millimeters and (move between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2 flexibly, be not rebuffed), arc length is that pairing central angle is 80 degree.After finishing 7 making of hemisphere housing reflection horizon, unload the opening mould 6 that places on the integrating sphere shell aperture 5, draw according to the shape of this opening 5 with instrument and dig up polytetrafluorethylepowder powder 1, the opening that obtains being shaped.At last, semisphere internal mold 3 is taken out in this hemisphere placement after 15 hours, again that two hemisphere are involutory, fastening two metal shells make integrating sphere.Fig. 3 is a sectional view of finishing the integrating sphere of making.
Referring to Fig. 1, Fig. 2.Make 250 millimeters of diameters, 30 millimeters of reflector thickness, density 1.8g/cm
3Integrating sphere.In the semisphere of metal integrating sphere hemisphere shell 2, put into semisphere internal mold 3, make both concentric, insert the tetrafluoroethene powder 1 of no more than 0.5kg, with 30 millimeters of width, thickness is 28mm, the arc length central angle is 85 degree, the extrusion die 4 that has pressure indicator, pressure with 4.2kg, on semisphere internal mold 3 planes, cross the axis M of center of circle O, between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2, do circular motion, polytetrafluorethylepowder powder 1 between the semisphere inwall that is filled in semisphere internal mold 3 and integrating sphere hemisphere shell 2 is pushed, after finishing the compacting in an orientation, extrusion die 4 is crossed angle of normal N rotation of center of circle O around semisphere internal mold 3 planes, with above-mentioned same pressure and mode polytetrafluorethylepowder powder 1 is pushed, finish after the compacting in one week of 3 planes of semisphere internal mold, progressively pressure boost is to 1.8g/cm
3The pairing pressure of density repeats above-mentioned pressing process.After finishing this round reflection horizon compacting, inserting polytetrafluorethylepowder powder 1 more as one feels fit between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2, repeat said process, is 1.8g/cm until making density
3Hemisphere housing reflection horizon 7.Then, remove the opening mould 6 on the integrating sphere hemisphere shell 2, draw and scrape out shape opening 5.At last, semisphere internal mold 3 is taken out in this hemisphere placement after 36 hours, again that two hemisphere are involutory, make integrating sphere behind the fastening two metal integrating sphere hemisphere shells 2.Used polytetrafluorethylepowder powder 1 trade mark of present embodiment integrating sphere is Lufs-4s-01 (or granularity is 10～250 microns), maximum pressure that is applied in the pressing process and reflection horizon 1.8g/cm
3Density is corresponding.
Referring to Fig. 1, Fig. 2.Make 1200 millimeters of diameters, 25 millimeters of reflector thickness, density 1.3g/cm
3Integrating sphere.Consider that this spheroid is big and polytetrafluorethylepowder powder 1 is mobile poor, the bottom is difficult for inserting, and is 10 to spend with interior inserting by 1.3g/cm than the flat part bottom the semisphere inwall of 1250 millimeters metal integrating sphere hemisphere shells 2 at interior diameter in advance
3The polytetrafluorethylepowder powder 1 of densitometry is put into semisphere internal mold 3 again, and exerts pressure and make semisphere internal mold 3 concentric with the semisphere inwall of metal integrating sphere hemisphere shell 2.Said process forms than behind the large tracts of land bottom reflector, with a width is 60 millimeters, thickness is 24 millimeters, the arc length central angle is 85 degree, the extrusion die 4 that has pressure indicator, pressure with 7.2kg, on semisphere internal mold 3 planes, cross the axis M of center of circle O, between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2, do circular motion, polytetrafluorethylepowder powder 1 between the semisphere inwall that is filled in semisphere internal mold 3 and integrating sphere hemisphere shell 2 is pushed, after finishing the compacting in an orientation, extrusion die 4 is crossed angle of normal N rotation of center of circle O around semisphere internal mold 3 planes, with above-mentioned same pressure and mode polytetrafluorethylepowder powder 1 is pushed, finish after the compacting in one week of 3 planes of semisphere internal mold, progressively pressure boost is to 1.3g/cm
3The pairing pressure of density repeats above-mentioned pressing process.After finishing this round reflection horizon compacting, inserting polytetrafluorethylepowder powder 1 more as one feels fit between the semisphere inwall of semisphere internal mold 3 and integrating sphere hemisphere shell 2, repeat said process, is 1.3g/cm until making density
3Hemisphere housing reflection horizon 7.Then, remove the opening mould 6 on the integrating sphere hemisphere shell 2, draw and scrape out shape opening 5.At last, semisphere internal mold 3 is taken out in this hemisphere placement after 70 hours, again that two hemisphere are involutory, make integrating sphere behind the fastening two metal integrating sphere hemisphere shells 2.Used polytetrafluorethylepowder powder 1 trade mark of present embodiment integrating sphere is Lufs-4s-01 (or granularity is 10～250 microns), maximum pressure that is applied in the pressing process and reflection horizon 1.3g/cm
3Density is corresponding.
Obviously, those skilled in the art can carry out various changes and modification to the method for making of optical integration ball of the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (5)
1, a kind of method for making of optical integration ball, comprise polytetrafluorethylepowder powder (1) is filled between the semisphere inwall and semisphere internal mold (3) of integrating sphere hemisphere shell (2), opening, involutory is carried out to it in repressed back, it is characterized in that finishing according to the following steps:
(a) with an above extrusion die (4), on semisphere internal mold (3) plane, cross the axis (M) in the center of circle (O), between the semisphere inwall of semisphere internal mold (3) and integrating sphere hemisphere shell (2), do circular motion, polytetrafluorethylepowder powder (1) between the semisphere inwall that is filled in semisphere internal mold (3) and integrating sphere hemisphere shell (2) is pushed, and its pressure is 0.5～50kg/cm
2
(b) finish the compacting in an orientation after, extrusion die (4) is crossed angle of normal (N) rotation of the center of circle (O) around semisphere internal mold (3) plane, repeating step (a) is until rotating a circle;
(c) under the situation of pressure boost progressively, repeating step (a), step (b) are until reaching needed density;
(d) filled polytetrafluoroethylene powder (1), repeating step (a)～(c) is 0.8～1.8g/cm until making density
3Hemisphere housing reflection horizon (7).
2, the method for making of optical integration ball according to claim 1, it is characterized in that extrusion die (4) is the equal thickness curved body, the radius of its negative camber radius 〉=hemisphere internal mold (3), the inside radius of the semisphere inwall of positive camber radius≤integrating sphere hemisphere shell (2), the pairing central angle of arc length is between 30～150 degree, and width is 1/100～1/2 of extrusion die (a 4) mean radius of curvature.
3, the method for making of optical integration ball according to claim 1 is characterized in that having pressure indicator on the extrusion die (4).
4, the method for making of optical integration ball according to claim 1 is characterized in that 1/3 of the amount of inserting of the once amount of inserting of polytetrafluorethylepowder powder (1)≤always.
5, the method for making of optical integration ball according to claim 1 is characterized in that concentric and two hemispheres section is same plane to integrating sphere hemisphere shell (2) with semisphere internal mold (3), and the difference of its radius-of-curvature is 5～50mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101061945A CN100337098C (en) | 2003-10-31 | 2003-10-31 | Method for manufacturing optical integrating ball |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101061945A CN100337098C (en) | 2003-10-31 | 2003-10-31 | Method for manufacturing optical integrating ball |
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| CN1611928A CN1611928A (en) | 2005-05-04 |
| CN100337098C true CN100337098C (en) | 2007-09-12 |
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| CNB2003101061945A Expired - Fee Related CN100337098C (en) | 2003-10-31 | 2003-10-31 | Method for manufacturing optical integrating ball |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180016374A1 (en) * | 2016-07-18 | 2018-01-18 | Korea Research Institute Of Standards And Science | Large polytetrafluoroethylene integrating sphere fabrication method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100590350C (en) * | 2008-03-05 | 2010-02-17 | 中国科学院安徽光学精密机械研究所 | LED based spectrum distribution adjustable illuminating source system |
| CN105259115B (en) * | 2015-09-29 | 2018-04-10 | 北京卫星制造厂 | A kind of portable solar absorptance detector |
| CN109580172B (en) * | 2018-11-06 | 2020-09-15 | 中国计量科学研究院 | Microscopic imaging radiation calibration substrate and preparation method thereof |
| CN112873972B (en) * | 2021-02-23 | 2023-02-24 | 郑州华晶金刚石股份有限公司 | Preparation process of graphite column for diamond synthesis |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85200717U (en) * | 1985-04-01 | 1986-01-08 | 中国科学院安徽光学精密机械研究所 | Optical integrating ball |
| JPH01218808A (en) * | 1988-02-29 | 1989-09-01 | Matsushita Electric Ind Co Ltd | Manufacture of optical element press molding die |
| US5958587A (en) * | 1997-04-21 | 1999-09-28 | Owens-Illinois Closure Inc. | Method of removing blemishes in compression molded articles |
| CN2432578Y (en) * | 2000-06-12 | 2001-05-30 | 中国科学院安徽光学精密机械研究所 | Optical integrating-sphere |
| JP2002303547A (en) * | 2001-04-03 | 2002-10-18 | Canon Inc | Integrating sphere, and spectrometer and spectrometry using the same |
-
2003
- 2003-10-31 CN CNB2003101061945A patent/CN100337098C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85200717U (en) * | 1985-04-01 | 1986-01-08 | 中国科学院安徽光学精密机械研究所 | Optical integrating ball |
| JPH01218808A (en) * | 1988-02-29 | 1989-09-01 | Matsushita Electric Ind Co Ltd | Manufacture of optical element press molding die |
| US5958587A (en) * | 1997-04-21 | 1999-09-28 | Owens-Illinois Closure Inc. | Method of removing blemishes in compression molded articles |
| CN2432578Y (en) * | 2000-06-12 | 2001-05-30 | 中国科学院安徽光学精密机械研究所 | Optical integrating-sphere |
| JP2002303547A (en) * | 2001-04-03 | 2002-10-18 | Canon Inc | Integrating sphere, and spectrometer and spectrometry using the same |
Non-Patent Citations (1)
| Title |
|---|
| "聚四氟乙烯压制品的反射特性及其应用" 胡维生，《塑料工业》 1983 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180016374A1 (en) * | 2016-07-18 | 2018-01-18 | Korea Research Institute Of Standards And Science | Large polytetrafluoroethylene integrating sphere fabrication method |
| US10787530B2 (en) * | 2016-07-18 | 2020-09-29 | Korea Research Institute Of Standards And Science | Large polytetrafluoroethylene integrating sphere fabrication method |
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| CN1611928A (en) | 2005-05-04 |
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