One modification that is commonly requested by our Customers is changing the F/# of a standard lens. The most common reason to stop down a lens is to resolve more detail and gain greater depth of field in an image. However, the term itself can sometimes be confusing, and there are limits to how much you can stop down a lens before encountering diminishing returns. “Stopping down a lens” refers to increasing the numerical f-stop…
Innovation, Performance, Support and Value
Sunex specializes in high-performance lenses and customized solutions from design to manufacturing. We have built a high quality manufacturing organization (ISO9001, ISO14001 and TS16949 certified) enabling us to deliver cost-effective optics flawlessly manufactured with outstanding reliability to customers worldwide. We take pride in providing in-depth technical support to our customers.
“We are getting great feedback from the field on the camera image quality, people are saying things like spectacular and magnificent. This, of course, starts with the excellent lens you are delivering.”
“Initial evaluation indicates a contrast of 40-50% with our object. This is better than our requirement of 30%. This is for each of the three images at 520, 550, and 630 nm without re-focusing. This is excellent performance.”
“Thanks guys, I am very satisfied.!!! This lens is a big improvement in our digital product.”
Knowledge Center Recent Articles
Super wide-angle lenses and fisheye lenses have pronounced barrel distortion. When viewing a flat object, off-axis features are “squeezed” significantly relative to the on-axis ones. This reduces the effective off-axis resolutions. For many applications, it is an undesirable effect. It is possible to post-processing the image to reduce this effect. However, post-processing in software reduces the image quality because the missing off-axis information must now be interpolated. We created a new class of super wide-angle…
Certain applications require a broad spectral operating range and customers oftentimes inquire whether a lens can perform “well” out to their wavelength of interest. These requests typically involve both visible (VIS) and near infrared (NIR) wavelengths. For purposes of this discussion, a wavelength range roughly from 470nm (or lower) out to about 850-950nm is assumed. Fundamentally, it is important to consider the use-case of the lens and determine how the VIS and NIR wavelengths apply…
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Products & Solutions
Fisheye Lens for DSLR Camera
SuperFisheye® lenses with a field of view of 185 degrees are designed for digital SLR cameras such as the Canon 50D and Nikon D300. These lenses are useful for producing 360 degree panoramic images and fully immersive images (similar to Google Street View). We also provide panoramic rotators and proprietary Dewarper software for these lenses.
Industrial Imaging Lenses
These lenses are used for finite object imaging applications such as face/object recognition, barcode capturing, machine vision, and bio-medical securities. Their small size is compatible with a variety of hand-held products. We can also integrate auto-focus technologies with these lenses.
Security & Surveillance
These lenses are designed for security/ surveillance cameras where low light and day/night operations are important. The lenses have a field of view up to 185 degrees (superfisheye). Certain lenses are also spectrally optimized to cover the visible and the near infrared spectrum (NIR). We also provide day/night exchangers and special IR cut-off filters.
Typical video-conferencing cameras require lenses with high image quality and low distortion. For high frame rates in low light situation, a lens with low f/# is required. We offer lenses with advanced optical technology incorporating high-index materials and aspherical elements in various imager sizes. We also provide IR cut-off filters and optical low-pass filters as part of a complete optical solution.
If off-the-shelf optics does not meet your application requirement, we can also work with you to design, prototype and mass-produce custom optics tailored to your specific needs. We manufacture quality optics in our facilities in China and provide professional support from our USA office.