mirror grinding method and glass lens

US20020019200A1 - Mirror grinding method and glass lens ...

A mirror surface grinding method processes an optical glass material into a lens shape using a cup-shaped grinding stone. The grinding stone is pupplied with a polishing solution which contains charged fine particles, thereby electrically attaching the charged fine particles to the grinding stone. The grinding stone is rotated and moved relative to the optical glass material along a final ...

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Mirror grinding method and glass lens - Olympus Optical

A mirror surface grinding method processes an optical glass material into a lens shape using a cup-shaped grinding stone. The grinding stone is pupplied with a polishing solution which contains charged fine particles, thereby electrically attaching the charged fine particles to the grinding stone.

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Lens Mirror Making Best lenses and mirrors are both made ...

Lens Mirror Making Best lenses and mirrors are both made by grinding the surface Start with a mirror or lens blank For mirrors only surface needs to be good Typical mirror want pyrex (eg BK7) Then need a tool blank – poorer glass softer glass Place mirror on top tool

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Lens Mirror Making Best lenses and mirrors are both made ...

Lens Mirror Making • Best lenses and mirrors are both made by grinding the surface • Start with a mirror or lens blank • For mirrors only surface needs to be good • Typical mirror want pyrex (eg BK7) • Then need a tool blank – poorer glass softer glass • Place mirror on top tool

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lenses - Lens and Mirror Grinding - Physics Stack Exchange

2. Use a torch to "partially melt" the surface of the lens and the surface tension of liquid will smooth it out. The 2nd step requires a lot of skills, melting too quickly will deform your lens. You may need some practice on a spare surface before doing it on your actual lens. 

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Mirror grinding - scope making

My favorite method is to grind with the chordal stroke a bit deeper (0.2-0.3 mm on this mirror size) than the target saggita , then use TOT until end of grinding. This saves a lot of grit! As you might noticed by now, much of the grit is wasted as it falls in the space between the tiles.

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Lens Mirror Making Best lenses and mirrors are both made ...

Best lenses and mirrors are both made by grinding the surface Start with a mirror or lens blank For mirrors only surface needs to be good Typical mirror want pyrex (eg BK7) Then need a tool blank – poorer glass softer glass Place mirror on top tool Now add grinding compound (grit) between tool mirror Grinding – moving the mirror over the tool with grit between)

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Lens Mirror Making Best lenses and mirrors are both made ...

• Best lenses and mirrors are both made by grinding the surface • Start with a mirror or lens blank • For mirrors only surface needs to be good • Typical mirror want pyrex (eg BK7) • Then need a tool blank – poorer glass softer glass • Place mirror on top tool • Now add grinding compound (grit) between tool mirror • Grinding – moving the mirror over the tool with grit between)

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Precision and mirror micro-grinding of micro-lens array on ...

ORIGINAL ARTICLE Precision and mirror micro-grinding of micro-lens array on macro-freeform glass substrate for micro-photovoltaic performances L. Zhang1 J. Xie1 R. B. Guo1 K. K. Wu1 P. Li ...

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A Study on the Mirror Grinding for Mold of a Small ...

An aspheric glass lens is fabricated by the high temperature and pressure molding using a tungsten carbide molding core, so precision grinding technology for the molding core surface are required.

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Joy of Mirror Making: Rough Grinding

The first method is by far the most popular. Grinding the curve into the mirror face can be done by one of the following approaches: Ceramic tiled tool ground against the mirror face. Glass tool ground against the mirror face. Ring tool. Motorized grinding wheel on the end of along boom that is anchored that is moved back and forth across the mirror face.

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Study on a 5-axis precision and mirror grinding of glass ...

01-10-2016  30-μm-size and 3-μm-size diamond grindings along with the tool posture angle of 30° and the tool path interval of 20–25 μm may be performed to fabricate the precision and mirror freeform glass in 5-axis grinding system.

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An Introduction to the Optics Manufacturing Process

31-10-2008  precise the generation is, the lens may go through several stages of polishing. Whereas the grinding process mechanically removes material by breaking off small pieces of glass, the polishing process is both mechanical and chemical. In this stage, the final figure is put into the lens, including its radius of curvature and center thickness. There

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Tiny lenses Lens on Leeuwenhoek

In Micrographia, in 1665, Hooke described a third method, in addition to grinding and blowing: how to pull or draw a glass rod to make a lens. Take a very clear piece of a broken Venice Glass, and in a Lamp draw it out into very small hairs or threads, then hold the ends of these threads in the flame, till they melt and run into a small round Globul, or drop, which will hang at the end of the thread.

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Refractor lens making? - ATM, Optics and DIY Forum ...

20-05-2007  Arriving at the nominal lens thickness is just a matter of carefully converging to the point of having both the right radius and about 1.5-2X the depth of glass remaining to remove after the coarse grind. After 240 grit, perhaps .01" is a comfortable depth to have remaining to remove. Back to top.

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CNC Optical Grinding Machines OptiPro

And never sacrifice quality by using the PRO Series or eSX 5-Axis CNC lens grinding platform that’s right for you. Spheres, aspheres, cylinders, prisms, and freeforms. Glass, ceramics, and hardened steels. Lens sizes from 5-500 mm. We have the right grinding solution for your application.

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Lens Mirror Making Best lenses and mirrors are both made ...

Best lenses and mirrors are both made by grinding the surface Start with a mirror or lens blank For mirrors only surface needs to be good Typical mirror want pyrex (eg BK7) Then need a tool blank – poorer glass softer glass Place mirror on top tool Now add grinding compound (grit) between tool mirror Grinding – moving the mirror over the tool with grit between)

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Study on a 5-axis precision and mirror grinding of glass ...

01-10-2016  30-μm-size and 3-μm-size diamond grindings along with the tool posture angle of 30° and the tool path interval of 20–25 μm may be performed to fabricate the precision and mirror freeform glass in 5-axis grinding system.

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Hand Grinding a Telescope Mirror Make:

30-05-2014  This is how you make a telescope mirror out of a hunk of glass: Use a sand mixture and another piece of glass to grind away the middle of a concave shape. Repeat with finer and finer grit sand. Dave Barosso demonstrates the technique, but to do it yourself, try to visit one of the Telescope Makers Workshop‘s classes on Friday nights in Oakland.

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Machining of Aspherical Molding Dies Utilizing Parallel ...

aspherical profile. The property of the ground surface by the parallel grinding method and the conventional method (cross grinding method) was compared about tungsten carbide (WC) for glass lens molding dies. It is clear that a better surface quality is obtained by the parallel grinding method. Key words: mirror grinding, parallel grinding ...

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Leonardo Da Vinci's mirror making machines

Place the concave mirror far from the centre [i.e. from the focal point of the lens] so that the images which it receives inverted it will show upright, because of the distance from the centre. In this way, above the hole on the white paper you will see the images of the things which are outisde so clearly and openly that you will never cease to be delighted and amazed.

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Dokas Photos – How To Ground Your Own Glass

I was familiar with lens grinding, having ground my own 8" reflective telescope mirror in high school. I even had on hand some of the grits packed away in the attic. I visited my local glass supplier to find some glass similar to my cracked ground glass to use as a blank.

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Newport Glass Works, LTD. Grinding, Polishing and

The tile support can be plaster, aluminum or glass. Epoxy or hard pitch is used to glue the tiles into place. The greatest problem with pitch is that the tiles may fall off in rough grinding. A plaster support is made by wrapping a metal or cardboard dam around the mirror a couple of inches high.

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Laboratory 7: Properties of Lenses and Mirrors

Focal length by the Method of Coincidence 1. Use lens 2 for this part. Mount a plane mirror as close to lens 2 as possible. Mount the illuminated object on the opposite site of the lens from the mirror and adjust its position until a distinct image of the cross wire shows on an object screen held just to the side of the illuminated object.

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Refractor lens making? - ATM, Optics and DIY Forum ...

20-05-2007  Arriving at the nominal lens thickness is just a matter of carefully converging to the point of having both the right radius and about 1.5-2X the depth of glass remaining to remove after the coarse grind. After 240 grit, perhaps .01" is a comfortable depth to have remaining to remove. Back to top.

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Vermeer’s Secret Tool: Testing Whether The Artist Used ...

If the lens focused its image onto a small, angled mirror, and the mirror was placed just between the painter’s eye and the canvas, by glancing back and forth he could copy that bit of image ...

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