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principle of mirror grinding

Precision mirror grinding and machining of steel

2020-12-5  The basic principle of ELID grinding technology On-line electrolytic dressing mirror grinding is a new ultra-precision machining technology developed in Japan in the early 1990s. It uses cast iron or iron fiber bond diamond or CBN grinding wheel to

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Fast Mirror Grinding Polishing - The ATMs Workshop

2001-11-15  The mirror ended up with a very smooth, zone free, nearly spherical figure ready for final figuring. Figure 1: Polishing pads applied to a 9 inch grinding tool. Another local ATM has also tried the polishing pads with abrasive and CeO. His own 17.5" mirror

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Astro-Tel - Mirror grinding machine

2001-4-12  MIRROR GRINDING MACHINE. I made my first mirror grinding and polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telescope Making" Book 1. A bowl which rotated was

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(PDF) Grinding of aspherical SiC mirrors

The directrix of. the circular cylinder is the circle x2+y2=R 2 while the directrix of the elliptic cylinder is the ellipse. x2/a2+y2/b2= 1. 2.3 Grinding of toroidal mirrors. A concave or convex ...

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Investigation on mirror surface grinding characteristics ...

The state of the art in motion accuracy produced by ultra-precision machine tools is in the order of nanometer. 28, 29 In this grinding principle, the depth of cut is the ratio of infeed rate to ...

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Newport Glass Works, LTD. Grinding, Polishing and

2014-7-21  Start grinding by concentrating the center of the mirror on the edge of the tool. Use a long "W" stroke, occasionally stroking the center of the mirror out to 2" to 3" from the edge of the tool, progressing around the circumference of the tool rotating the mirror.

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Journal of Materials Processing Technology GRINDING OF ...

2016-8-20  Automatic grinding of toroidal mirrors was tried [3]. The principle of the method is to shape a toroid-shaped (barrel-shaped) grinding wheel and control the relative position of the workpiece and the grinding wheel in the grinding process. Two kinds of grinding operations are possible.

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mirror polished stainless steel sheet - Jaway Steel.

Machinery mirror polishing on the metal material after polishing process (coarse grinding, fine grinding and polishing process (WENDT three-step polishing) so as to achieve smooth and bright like a mirror surface. 1)Polished in order to gain ground surface

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Grinding and Polishing - ASM International

2013-11-24  Grinding uses fixed abrasives—the abrasive particles are bonded to the paper or platen—for fast stock removal. Polishing uses free abrasives on a cloth; that is, the abrasive particles are suspended in a lubricant and can roll or slide across the cloth and specimen. A book edited by Marinescu et

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Making a Mirror. - Astronomy

2002-12-16  The mirror is a piece of glass, so treat it that way. This whole process of making a lens or mirror surface was originally discovered way before the time of Christ and is really a very crude process that does some very precision machining JUST BECAUSE

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Astro-Tel - Mirror grinding machine

2001-4-12  MIRROR GRINDING MACHINE. I made my first mirror grinding and polishing machine over thirty years ago. It used the working principle of the machine illustrated at "A" Fig.3, Page 163, "Amateur Telescope Making" Book 1. A bowl which rotated was

More

Investigation on mirror surface grinding characteristics ...

The state of the art in motion accuracy produced by ultra-precision machine tools is in the order of nanometer. 28, 29 In this grinding principle, the depth of cut is the ratio of infeed rate to ...

More

Newport Glass Works, LTD. Grinding, Polishing and

2014-7-21  Start grinding by concentrating the center of the mirror on the edge of the tool. Use a long "W" stroke, occasionally stroking the center of the mirror out to 2" to 3" from the edge of the tool, progressing around the circumference of the tool rotating the mirror.

More

Journal of Materials Processing Technology GRINDING OF ...

2016-8-20  Automatic grinding of toroidal mirrors was tried [3]. The principle of the method is to shape a toroid-shaped (barrel-shaped) grinding wheel and control the relative position of the workpiece and the grinding wheel in the grinding process. Two kinds of grinding operations are possible.

More

Reflecting Newtonian telescope: Physclips - Light

2016-6-25  He then developed the technique of mirror grinding so that he could invent a telescope in which most of the focussing came from a mirror and thus depended only on geometry, not refractive index. Rather than having the operator put his/her head in the scope, a small plane mirror

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mirror polished stainless steel sheet - Jaway Steel.

Machinery mirror polishing on the metal material after polishing process (coarse grinding, fine grinding and polishing process (WENDT three-step polishing) so as to achieve smooth and bright like a mirror surface. 1)Polished in order to gain ground surface

More

How mirror is made - material, manufacture, making ...

The tolerances on the mirror will affect the cost and ease with which it can be manufactured. Batch mirror uniformity is the first and fore-most job of quality assurance. Mirrors on the edge of a grinding plate or evaporator chamber may not have the same

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Grinding and Polishing - ASM International

2013-11-24  Grinding uses fixed abrasives—the abrasive particles are bonded to the paper or platen—for fast stock removal. Polishing uses free abrasives on a cloth; that is, the abrasive particles are suspended in a lubricant and can roll or slide across the cloth and specimen. A book edited by Marinescu et

More

Making a Mirror. - Astronomy

2002-12-16  The mirror is a piece of glass, so treat it that way. This whole process of making a lens or mirror surface was originally discovered way before the time of Christ and is really a very crude process that does some very precision machining JUST BECAUSE

More

Optical Testing of Parabolic Mirrors : 9 Steps (with ...

A mirror mount is needed to hold the mirror during testing. If the mirror is a 'thin' mirror (i.e. the thickness is much less than 1/8th its diameter) then the mount must hold the mirror without deforming it. The weight of the glass can deform a thin mirror. In my case, I was making a full-thickness mirror, which is a mirror whose thickness is 1/8th the diameter or more, so mirror deformation ...

More

Reflecting Newtonian telescope: Physclips - Light

2016-6-25  He then developed the technique of mirror grinding so that he could invent a telescope in which most of the focussing came from a mirror and thus depended only on geometry, not refractive index. Rather than having the operator put his/her head in the

More

Hubble's Mirror Flaw NASA

2019-11-25  Once Hubble began returning images that were less clear than expected, NASA undertook an investigation to diagnose the problem. Ultimately the problem was traced to miscalibrated equipment during the mirror's manufacture. The result was a mirror with an aberration one-50th the thickness of a human hair, in the grinding of the mirror.

More

How mirror is made - material, manufacture, making ...

The tolerances on the mirror will affect the cost and ease with which it can be manufactured. Batch mirror uniformity is the first and fore-most job of quality assurance. Mirrors on the edge of a grinding plate or evaporator chamber may not have the same

More

Making a Mirror. - Astronomy

2002-12-16  The mirror is a piece of glass, so treat it that way. This whole process of making a lens or mirror surface was originally discovered way before the time of Christ and is really a very crude process that does some very precision machining JUST BECAUSE

More

Introduction of Polycrystalline Diamond (PCD ...

2019-1-15  Electrolytic in-process dressing (ELID) precision mirror grinding technology is a kind new ultra-precision machining technology developed by Japan Institute of Physics and Chemistry in the late 1980s. Its basic principle is that use the dynamic balance

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The Central Principle of Optical Cemented Lenses -

The transparency of the optical cemented mirror to a certain wavelength is expressed by the light absorption coefficient Kλ. After the light passes through a series of prisms and lenses, some of its energy is lost at the interface reflection of the optical components and some is

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Grinding and Polishing - ASM International

2013-11-24  Grinding uses fixed abrasives—the abrasive particles are bonded to the paper or platen—for fast stock removal. Polishing uses free abrasives on a cloth; that is, the abrasive particles are suspended in a lubricant and can roll or slide across the cloth and specimen. A book edited by Marinescu et

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Making the 20 inch Conical Mirror Pierre Lemay

Almost 70 % of the light gathering surface of the pyrex mirror is less than an inch thick and, the glass is suspended, with no mirror cell touching it, favoring natural convection with the surrounding air. Preparing the blank for rough grinding. To do these

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对称非球面镜的对比法独立在位测量和补偿磨削_百度文库

对称非球面镜的对比法独立在位测量和补偿磨削_物理_自然科学_专业资料 为提高大口径非球面镜磨削阶段的在位测量和补偿磨削精度,提出了具有独立在位测量框架的补偿磨削系统,对该系统的测量原理、测量框架和补偿方法进行了研究.首先介绍基于直线运动轴和长度计组成的测量框架以及对比法 ...

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Optical Testing of Parabolic Mirrors : 9 Steps (with ...

A mirror mount is needed to hold the mirror during testing. If the mirror is a 'thin' mirror (i.e. the thickness is much less than 1/8th its diameter) then the mount must hold the mirror without deforming it. The weight of the glass can deform a thin mirror. In my case, I was making a full-thickness mirror, which is a mirror whose thickness is 1/8th the diameter or more, so mirror deformation ...

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grinding an optical flat mirror

2021-5-15  Fine grinding. A flatness in the range of 1 µm can be reached by grinding three glass blanks alternatingly against each other, blank 1 on 2, 2 on 3, 3 on 1, and so on. This will be continued with each Carbo grade. After fine grinding, one of the blanks is picked as the future flat mirror and will be polished.

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Hubble's Mirror Flaw NASA

2019-11-25  Once Hubble began returning images that were less clear than expected, NASA undertook an investigation to diagnose the problem. Ultimately the problem was traced to miscalibrated equipment during the mirror's manufacture. The result was a mirror with an aberration one-50th the thickness of a human hair, in the grinding of the mirror.

More

How mirror is made - material, manufacture, making ...

The tolerances on the mirror will affect the cost and ease with which it can be manufactured. Batch mirror uniformity is the first and fore-most job of quality assurance. Mirrors on the edge of a grinding plate or evaporator chamber may not have the same

More

Fewer-axis grinding methodology with simultaneously ...

2018-8-28  This paper presents a grinding force control strategy with simultaneously guaranteeing surface accuracy for large optical SiC mirror. A fewer-axis grinder with toric wheel is used to ensure the high stiffness during the grinding process. According to the geometric properties of the contact area at the grinding point between the grinding wheel and the workpiece, the relationship between the ...

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Making a Mirror. - Astronomy

2002-12-16  The mirror is a piece of glass, so treat it that way. This whole process of making a lens or mirror surface was originally discovered way before the time of Christ and is really a very crude process that does some very precision machining JUST BECAUSE

More

Introduction of Polycrystalline Diamond (PCD ...

2019-1-15  Electrolytic in-process dressing (ELID) precision mirror grinding technology is a kind new ultra-precision machining technology developed by Japan Institute of Physics and Chemistry in the late 1980s. Its basic principle is that use the dynamic balance

More

Grinding and Polishing - ASM International

2013-11-24  Grinding uses fixed abrasives—the abrasive particles are bonded to the paper or platen—for fast stock removal. Polishing uses free abrasives on a cloth; that is, the abrasive particles are suspended in a lubricant and can roll or slide across the cloth and specimen. A book edited by Marinescu et

More

G32 - leadercnc.co.uk

2020-10-28  principle of TOYODA STAT BEARING. 0.016μm Wheel spindle rotational accuracy 0.2μm/DIV An Example of Lissajou's Figure Grinding force hydro-dynamic pressure hydro-static pressure hydro-static pressure Ps Ps Example of mirror face finish grinding Roundness 0.14μm Surface roughness Rz=0.161μm 5μm [Grinding machine]GOP32×50 Grinding condition

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How to Make a Telescope - willbell

2019-3-11  2.3. The Mirror Blank and Tool 2.4. Abrasives 2.5. Polishing Materials 2.6. Summary of Grinding and Polishing Needs 2.7. Work Support and Accessories 2.8. Preparing the Mirror Disk 2.9. Rough Grinding 2.10. Testing Radius of Curvature 2.11. Finishing Rough Grinding 2.12. Fine Grinding and Smoothing 2.13. Characteristics of the Smoothed Optical ...

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Optical Testing of Parabolic Mirrors : 9 Steps (with ...

A mirror mount is needed to hold the mirror during testing. If the mirror is a 'thin' mirror (i.e. the thickness is much less than 1/8th its diameter) then the mount must hold the mirror without deforming it. The weight of the glass can deform a thin mirror. In my case, I was making a full-thickness mirror, which is a mirror whose thickness is 1/8th the diameter or more, so mirror deformation ...

More