Diamond turning aspheric projector mirrors

Jiang, Wenda

doi:10.1117/12.782676

Cited by 3 publications

(2 citation statements)

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“…Diamond Turning (DT) has played a major part in producing precision optical components for many years [2]. Recent year developments in diamond turning has significantly improved the technology, expanded the fabrication capabilities of the machine and made it possible to diamond machine optics with microstructures and optical surface with non-radial symmetry.…”

Section: Methods Employed In Producing Microstructure Opticsmentioning

confidence: 99%

Diamond turning microstructure optical components

Jiang¹

2009

SPIE Proceedings

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Microstructure optical components in the form of Fresnel, TIR, microgroove, micro lens array provide a lot design freedom for high compact optical systems. It is a key factor which enables the cutting edge technology for telecommunication, surveillance and high-definition display system. Therefore, the demand of manufacturing such element is rapidly increasing. These elements usually contain high precision, tiny structure and complex form, which have posed many new challenges for tooling, programming as well as ultra-precision machining. To cope with the fast development of the technology and meet the increasing demand of the market, we have developed our own manufacturing process to fabricate microstructure optical components by way of Diamond tuning, Shaping, Raster cutting, Slow Slide Servo (SSS), Diamond milling and Post polishing. This paper is to focus on how we employed these methods to produce complex prototype of microstructure optical components and precision mold inserts which either contains aspheric lens array or freeform V grooves. The high quality finish of these surfaces meets application requirements. Measurement results are presented. Advantages and disadvantages of these methods are compared and discussed in the paper.

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Section: Methods Employed In Producing Microstructure Opticsmentioning

confidence: 99%

Diamond turning microstructure optical components

Jiang¹

2009

SPIE Proceedings

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“…DT involves the use of single-point diamond machining to fabricate high-precision optical components with critical surface finish requirements [12]. This technique has been used typically in the production of aspheric mirrors for highresolution projection systems [13]. On the other hand, plastic injection molding is a high-volume production method that offers low-cost manufacturing of optical elements [14].…”

Section: Introductionmentioning

confidence: 99%

Characterization of high aspect ratio miniature reflectors using negative shape polymer filling and image processing

Labib,

Eid,

Erfan

et al. 2024

Photonic Instrumentation Engineering XI

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Optical reflectors are essential components used in spectroscopy applications that require high-intensity and uniform sample illumination. Typically, reflector parameters such as curvature and dimensions are optimized to ensure efficient light direction from filament lamps to the sample under test. Elliptical reflectors are often used to collect all the light emitted from one focus and direct it to the other. However, the curvature of miniature reflectors can be challenging to evaluate using standard measurement tools and methods due to its high aspect ratio, which can present mechanical and optical limitations when trying to access and scan it. In this work, we report a characterization procedure to evaluate the different optical and dimensional parameters of a fabricated miniature elliptical reflector with a high aspect ratio of width to depth. We compare two fabrication methods, Plastic Molding, and Diamond Turning, to assess their effectiveness. The reflector's curvature is characterized using the negative shape filling method, where melted polymer is used to fill the reflector and allowed to cool until solidified, resulting in a negative convex shape of the reflector. The reflector's curvature is then calculated by fitting the shape to the appropriate elliptical function using image processing. This method shows good accuracy in evaluating the reflector's curvature. Furthermore, the reflector's optical performance and illumination spot are characterized by imaging the spot onto a target screen and detector, validating the good performance achieved with low-cost plastic molded reflectors compared to DT reflectors. The image quality and optical power identify surface roughness and coating quality, where the molded reflectors show better results compared to the DT reflector.

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Advances in the design and manufacturing of novel freeform optics

Kumar

Tong

Jiang

2022

Int. J. Extrem. Manuf.

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Freeform optics has become the most prominent element of the optics industry. Advanced freeform optical designs supplementary to ultra-precision manufacturing and metrology techniques have upgraded the lifestyle, thinking, and observing power of existing humans. Imaginations related to space explorations, portability, accessibility have also witnessed sensible in today’s time with freeform optics. Present-day design methods and fabrications techniques applicable in the development of freeform optics and the market requirements are focussed and explained with the help of traditional and non-traditional optical applications. Over the years, significant research is performed in the emerging field of freeform optics, but no standards are established yet in terms of tolerances and definitions. We critically review the optical design methods for freeform optics considering the image forming and non-image forming applications. Numerous subtractive manufacturing technologies including figure correction methods and metrology have been developed to fabricate extreme modern freeform optics to satisfy the demands of various applications such as space, astronomy, earth science, defence, biomedical, material processing, surveillance, and many more. We described a variety of advanced technologies in manufacturing and metrology for novel freeform optics. Next, we also covered the manufacturing-oriented design scheme for advanced optics. We conclude this review with an outlook on the future of freeform optics design, manufacturing and metrology.

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Diamond turning aspheric projector mirrors

Cited by 3 publications

References 0 publications

Diamond turning microstructure optical components

Diamond turning microstructure optical components

Characterization of high aspect ratio miniature reflectors using negative shape polymer filling and image processing

Advances in the design and manufacturing of novel freeform optics

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