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| Why Asphere? |
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Aspherical elements eliminate monochromatic aberrations (e.g. spherical aberration) and improve focusing and collimating accuracy. They replace a multiple spherical element assembly, thereby combining weight reduction and a more compact design. Thus the number of back reflections is reduced, and a higher transmission is achieved. |
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Applications:
- Digital Still Cameras (DSC)
- Digital Single Lens Reflex Cameras
- Camcorders
- Digital Projection
- Microscopy Eyepiece
- Binoculars
- Illumination Systems
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| Custom Design |
Shanghai Optics offers a variety of design services such as optical system design (imaging and non-imaging), opto-mechanical system design, and product design. In many cases, our dedicated design engineers can create ideal solutions for your optical challenges. We strive to assist our customers to find fastest, most affordable and most effective solutions to meet your specific needs. Please contact us and see how we can help. |
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| Optical Glass Asphere |
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| Material: Glass, Fused Silica |
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| Infrared Material Asphere |
| Material: Si, Ge, ZnSe, ZnS and more |
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| Forms of Supply |
Lens diameter: 5 to 120 mm
Lens thickness: 2 to 10 mm
Radii / pole radii Concave 20 to 250 mm
Radii / pole radii Convex 20 to 250 mm |
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Volume Discount |
Our trademark discounts for OEM-quantity orders are no secret! Please contact us and see how competitive we can be. |
Traditional polishing and the state-of-the-art molding technology. |
| I) Molding |
Shanghai Optics has identified several glasses that are suitable for precision molding due to their low transformation temperatures. |
BK-7, B270, Pyrex, Borosilicate, F2 etc. |
| Please contact us for your desired shape. Our engineering team will be happy to support you in making your aspherical lens design moldable. |
| Specifications |
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- Form error: ≤ 5 fringes (sph. side)
- Form error: ≤ 5 µm PV (asph. side)
- Irregularity: ≤ 2 fringes (sph. side)
- Tilt: ≤ 2´
- Surface roughness: < 1 nm rms
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| II) Traditional Polishing |
The many challenges that optics manufacturers have had to overcome while polishing glass aspheric surfaces have left designers with little confidence that precision glass aspheres can be production volume, within specification, within budget and on time.
Over the past decade our maturing understanding of technology and process has lead to the emergence of “new tools” which make it possible for us to routinely produce a wide variety of complex glass aspheres. At Shanghai Optics we pride ourselves in the ability to produce affordable high precision glass aspheres that give our customers a competitive advantage. |
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| Specifications |
Diameter : from under 10 mm to over 300 mm
Maximal aspheric deviation from best-fit-sphere: from a few waves to a few millimeters
Maximal PV of surface from error: from under 1/10 wave to a few waves |
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