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grinding process aspheric

A novel automated process for aspheric surfaces

Richard et al. [34] reported the development of a novel industrial process, embodied in a new robotic polishing machine, for automatic grinding and polishing aspheric optics. The machine is ...

Efficient grinding and polishing processes for asphere ...

This process c creates a stable manuf facturing process which minim mizes tools we ear and leads to o improved form m accuracy an nd quality. 2.1 Aspheric cal Grinding As shown in figure 2, the S SCGa 100 uses four tool spindles to incorpo orate both cup- -wheel grindin ng and peripher ral wheel grinding opti ions onto the sa ame platform.

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Development on Synergistic Process and Machine Tools Integrated Inclined Axis Grinding and Magnetorheological Polishing for Small Aspheric Surface YIN Shaohui 1,2, GONG Sheng 1,2, HE Bowen 1,2, CHEN Fengjun 1, YIN Ziqiang 3, CAO Chengguo 4

Error Model for Grinding of Noncoaxial Aspheric Based on ...

A study on optimum grinding factors for aspheric convex surface micro-lens using design of experiments, International Journal of Machine Tools & Manufacture, Vol. 47, (2007), pp.509-520. DOI: 10.1016/j.ijmachtools.2006.06.007

The effect of grinding processing parameters on aspheric ...

Small scale waviness of aspheric surface inevitably occurs when grinding aspheric surface with grating parallel grinding technology, so aiming at the problem of waviness amplitude and uniformity, this paper theoretically analyses the relationship between grinding processing parameters and aspheric waviness, and designs a single factor experiment to verify the …

Development of Ultra-Precision Grinding Process for ...

The structure and function of the software system was described. An experimental test for grinding aspheric surface of WC mould was conducted for evaluating the performance of the compensation process by using this developed software. After compensation grinding for several times, form accuracy of PV 126 nm, roughness of Ra 3.4 nm can be obtained.

Process Mechanism in Shape Adaptive Grinding (SAG), …

Process Mechanism in Shape Adaptive Grinding (SAG), for Application to Aspheric X-Ray Mirror Molding Dies Yoshiharu Namba, Anthony Beaucamp Richard Freeman (Zeeko LTD) Shape Adaptive Grinding (SAG) is a novel process for freeform machining of difficult materials such as ceramics and hard metals. Despite low stiffness

High-Precision Aspheres: CNC Polished, N-BK7 or S-LAH64 ...

Thorlabs' Precision Aspheric Lenses are manufactured using a computer numerical control (CNC) process. By using CNC machines to grind and polish each lens (as opposed to molding), it becomes possible to produce large …

Ultra-precision grinding process of high-gradient thin ...

Ultra-precision grinding process of high-gradient thin conformal aspheric on ALON ceramic GUO Bing 1 ZHANG Chun-yu 1 WANG Jin-hu 1 ZHAO Qing-liang 1 CHEN Hong-xu 2 SUN Jin-xia 2 YU Xin 3 (1.Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, China 150001)

Lathe Converted for Grinding Aspheric Surfaces

Lathe Converted for Grinding Aspheric Surfaces The problem: Normal aspheric grinding equipment is specialized and prohibitively expensive for short production runs. The solution: A standard overarm tracing lathe converted by the addition of an independently driven diamond grinding wheel guided by the lathe tracer.

(PDF) Aspheric glass lens modeling and machining

The intelligent grinding system included several vibration, temperature, and acoustic emission sensors and a microphone to monitor the dynamic status of machine during the grinding process and ...

China Kfqm-20b High-Precision CNC Aspheric Grinding ...

China Kfqm-20b High-Precision CNC Aspheric Grinding Machine, Find details about China CNC Lathe, Grinding from Kfqm-20b High-Precision CNC Aspheric Grinding Machine - Atoman Science and Technology Ltd.

The Forming Process of Aspheric Lens - Hyperion Optics

The Forming Process of Aspheric Lens The Functions of a Fisheye Camera Lens ... Grinding and polishing are generally suitable for the production of a single aspheric lens at a time. With the improvement of technology, its accuracy is getting higher and higher. Most notably, precision polishing is controlled by a computer and automatically ...

Aspheric lens processing | GU-OPTICS

Aspheric processing The aspheric surface processing technology is mainly divided into four parts: blank production, grinding and shaping, polishing processing, and inspection of each process. First, process the spherical blank according to the design

Recent advances in aspheric and conformal grinding at the ...

The contouring DMG process produces aspheric surfaces within 1 micrometer of the intended surface shape with significantly lower surface roughness and less subsurface damage than conventional grinding processes. Grinding results on a variety of glasses, crystal and polycrystalline brittle materials are reported in this paper.

An equivalent-sphere-based grinding of large aspheric and ...

The grinding process was modeled, and the feasibility for grinding aspheric and spherical surfaces was verified. The criteria for ESSG-based grinding method were established, and the wheel position and posture models were derived.

Diamond Grinding of Aspheric Surfaces on a CNC 4-Axis ...

Hence the following process was selected to rough- grind the desired surface. A cup-tool with diamond grains embedded in bronze is used to rough grind the glass. Figure 1 shows a schematic diagram of this tool, while figure 2 is a photograph of such a tool. diamond and surface Figure 1 Cup tool with a grinding surface consisting of diamond ...

Aspheric glass lens modeling and machining

Aspheric glass lens modeling and machining R. Barry Johnsona, SPIE Fellow and Life Member, and Michael Mandinab, SPIE Member aCyberAir Development Corporation, 3077-K Leeman Ferry Rd., Huntsville, AL 35801, USA bOptimax Systems, Inc., 6367 Dean Parkway, Ontario, NY 14519, USA ABSTRACT The incorporation of aspheric lenses in complex lens …

Aspheric lens processing |

Aspheric processing The aspheric surface processing technology is mainly divided into four parts: blank production, grinding and shaping, polishing processing, and inspection of each process. First, process the spherical blank according to the design requirements.

(PDF) Shape Adaptive Grinding of Silicon Carbide Aspheric ...

Shape adaptive grinding (SAG) is a novel process for freeform machining of difficult materials such as ceramics and hard metals. Despite low …

Efficient Ray Tracing Through Aspheric Lenses and …

In the real world, the fabrication of large spherical/aspheric lenses involves mechanical grinding and polishing [LB07] (Figure3). The process has usually several phases; for instance, spherical grinding, precision grinding, and polishing are applied in sequence [FTG00]. Similarly, in precision glass molding, a mold is carved, which will

A study on optimum grinding factors for aspheric convex ...

The profile accuracy of aspheric surface is improved in fine grind. But ground surface roughness and transparency of aspheric surface micro-lens deteriorates in the grinding process. Polishing is performed to obtain high-quality aspheric surface micro-lens. The machining workflow of aspheric surface micro-lens is shown in Fig. 2. Download ...