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  • US6250992B1 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

    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

    US Patent Application for Mirror grinding method and

    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

    US Patent for Mirror grinding method and glass lens Patent

    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

    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.

    NEW Patent CD for Mirror grinding method and glass lens

    Amazon : NEW Patent CD for Mirror grinding method and glass lens : Other Products : Everything Else

    US 6,250,992 B1 Mirror grinding method and glass lens

    Patent US6250992B1 Mirror grinding method and glass lens (US 6,250,992 B1); Owner: Olympus Optical Corporation Limited; Filed: 03/31/1998; Est. priority date: 04/08/1997; Status: Expired due to F...

    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.

    Joy of Mirror Making: Rough Grinding

    Here are 42 inch [107cm] and 30 inch [762cm] mirrors slumped and annealed to F2.8 ready for fine 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.

    Precision and mirror micro-grinding of micro-lens array

    A hybrid of micro-lens array and freeform surface produces a novel micro-optic and micro-photovoltaic behaviors, but it is difficult to control both micro-form and macro-form accuracies in micro-machining of brittle photovoltaic glass. Hence, a ductile micro-grinding is proposed to replicate the precision-trued diamond wheel V-tip on macro-freeform glass substrate of solar cell.

    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.

    A USER'S GUIDE TO DESIGNING AND MOUNTING LENSES AND MIRRORS

    Always place a flat on a concave-shaped lens (see Fig. 3). The flat provides a mounting surface and avoids the danger of chipping the sharp edge. The outside diameter of a mirror or lens is usually generated by holding the element to a machine table with a vacuum chuck and grinding the edge. 2

    How to Grind glass « Glass Crafts :: WonderHowTo

    04-03-2008· How To:Grind glass. Grind glass. By Robin Mansur. 3/3/08 6:02 PM. WonderHowTo. Learn about grinding glass using various methods with experts from the Corning Museum of Glass

    Optical Surfaces Newport

    Optical Surfaces. The lens application drives the requirements for surface irregularity and surface quality. When preservation of wavefront is critical, λ/4 to λ/8 irregularity should be selected; when wavefront is not as important as cost, λ/2 irregularity can be used. For surface quality, the tighter the scratch-dig specification the lower

    Telescope Mirror Blanks / TelescopeMirrorBlanks.Com

    * Thin plate glass mirror blanks are lighter than standard mirror blanks, which allows you more flexibility in designing your telescope tube assembly and mount. * When grinding a telescope mirror, you will find that plate glass takes less time to grind and polish than a mirror made from borosilicate glass.

    Optics Study Guide Opticiansfriend

    Drop Ball Test: Z 87 Industrial Wear 50" free fall of a 1" steel ball weighing 2.4oz on the convex surface of hardened lens & minimum 2.0 (applies to polycarbonate and trivex only) mm at thinnest point (3.0 mm minimum thickness was the previous Z 87 requirement still is for glass and CR-39)

    US 6,250,992 B1 Mirror grinding method and glass lens

    Patent US6250992B1 Mirror grinding method and glass lens (US 6,250,992 B1); Owner: Olympus Optical Corporation Limited; Filed: 03/31/1998; Est. priority date: 04/08/1997; Status: Expired due to F...

    Newport Glass Works, LTD. Grinding, Polishing and

    To grind, place the mirror face up on something soft like an old piece of deep shag carpet so the glass won't rock. (The carpet will ruined.) Wet it down, add the appropriate amount of #60 abrasive, add a few pounds to the top of the tool if you wish, and grind like mad.

    GRINDING Astro Khan Telescope Making

    Once done, wash mirror and tool and inspect the Mirror’s surface; For 6 inch mirror I used a glass tool and used above method. For 8 inch mirror, I used a metal flange to hog the center of the mirror. Please note, rough grinding is a very noisy process and people

    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.

    Leonardo Da Vinci's mirror making machines

    Though Leonardo da Vinci creates sketches of mirror grinding, one crucial and logical question to ask is whether he used such mirrors in his artwork or drawing. On this subject, a bevy of scholarly research has surfaced both proclaiming and refuting da Vinci’s use of concave mirrors and lenses.

    How mirror is made material, manufacture, making

    The initial step in mirror manufacture involves cutting and shaping the glass blanks. Cutting is usually done with a saw with diamond dust embedded in the tips. Next, the blanks are put in optical grinding machines, which use abrasive liquid plus a grinding plate to produce a

    US4733502A Method for grinding and polishing lenses

    The method of both the surface grinding, or fining, and the polishing of a lens are accomplished on the same surfacing machine spindle, precisely reproducing the curvature and alignment from fining to polishing, thereby resulting in improved surface quality and optical properties. The fine grinding and polishing are accomplished using plain water by sequentially securing to and releasing from

    Development of Spiral Grinding Process Technology for

    16-09-2019· We propose a process technology that can be applied to a variety of applications by machining existing lenses to create an optical system required for research by modifying commercial glass optical systems. A 1-in. hole was created in an LF5 glass lens by drilling, followed by spiral grinding, and finally, precision spiral grinding.

    How to Grind glass « Glass Crafts :: WonderHowTo

    04-03-2008· How To:Grind glass. Grind glass. By Robin Mansur. 3/3/08 6:02 PM. WonderHowTo. Learn about grinding glass using various methods with experts from the Corning Museum of Glass

    CNC Optical Grinding Machines OptiPro

    Make life easy with state-of-the-art motion control components and positioning systems. 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

    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.

    Leonardo Da Vinci's mirror making machines

    Though Leonardo da Vinci creates sketches of mirror grinding, one crucial and logical question to ask is whether he used such mirrors in his artwork or drawing. On this subject, a bevy of scholarly research has surfaced both proclaiming and refuting da Vinci’s use of concave mirrors and lenses.

    Grinding,Polishing and Figuring Part 2 NEWPORT GLASS

    Fine grinding: I change from my rough grinding area to my fine grinding and polishing area after 220, not before. #220 is still gritty stuff. The "W" stroke: This is a casual way of describing any stroke that goes forward and backward while progressing left to right or right to left on the mirror.

    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

    Leonardo Da Vinci's mirror making machines

    ÝÝÝÝÝÝÝÝÝÝÝ In his Codice Atlantico, Leonardo offers two of sketches of mirror making machines.Ý One machine is designed for grinding concave mirrors of small focal length.Ý The other machine, a much larger piece to implement, grinds mirrors of large focal lengths.Ý Though Leonardo da Vinci creates sketches of mirror grinding, one crucial and logical question to ask is whether he

    Some lens design methods University of Arizona

    Some lens design methods Dave Shafer David Shafer Optical Design Fairfield, CT 06824 #203-259-1431 monocentric meniscus lens corrects for the spherical aberration of the mirror. Since glass) the lens bending that makes coma go to zero is almost exactly the plano-convex

    THE CHALLENGE OF GRINDING LENSES FOR SINGLE

    THE CHALLENGE OF GRINDING LENSES FOR SINGLE LENS MICROSCOPES. By: Alvaro Amaro de Azevedo (Brazil) 1.) INTRODUCTION. In my previous article (1), I have discussed the optics of ball lenses for single lens microscopes showing that it’s possible to obtain surprisingly good images from low budget materials and resources.

    Grinding your own microscope lens Science Toys

    So the method I will describe here is most likely different from the method used in 1668. We'll start by making the lens. Take a glass tube or rod, Move the wood back and forth on the sandpaper, grinding the glass down until there is a flat surface. We want to grind away about a quarter of the diameter.

    Telescope Making Supplies willbell

    Ronchi Screens or Ronchi Gratings have been used for many years as a quick qualitative method to evaluate overall mirror surface smoothness and figure. We stock a series of 7 gratings: 50, 75, 100, 125, 150, 175, and 200 lines per inch with equally spaced opaque lines that occupy 50

    Vermeer’s Secret Tool: Testing Whether The Artist Used

    29-11-2013· 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