29 August 2013

Focal Sweep Videography

A paper by variable focus lens manufacturer Optotune presents a focal sweep telephoto camera which is potentially of interest in defence and security applications, among others.

The system is enabled by Optotune’s liquid polymer based deformable optics.

A focal stack is a sequence of images captured with different focus settings. A number of cameras have been introduced that sweep the focal plane using mechanical motion in order to capture a focal stack. However, mechanical motion makes video capture impractical and is unsuitable for long focal length cameras, as large sensor travel poses serious practical issues.

This new Optotune paper presents a focal sweep telephoto camera that uses a variable focus lens to sweep the focal plane. The camera requires no mechanical motion and is capable of sweeping the focal plane periodically at high speeds. Optotune’s prototype camera has been used to capture Extended Depth of Field (EDOF) videos at 20fps, and to capture periodic focal stacks which can be used for several interesting applications such as video refocusing and trajectory estimation of moving objects, potentially of interest in security and defence applications. Telephoto imaging (e.g., scenes with depth range on the order of 10’s to 100’s of meters) is an area where focal sweep could be particularly useful because telephoto lenses typically have a narrow DOF.

Deformable optics can open the door for focal sweep videography. The fast response time of deformable optics enables periodic focal sweep at high frequencies. As a result, deformable lenses are particularly well suited for focal sweep cameras with large focal lengths, which would require large sensor motion using the swept-sensor approach.

More information here on Optotune’s deformable optics


05 April 2013

ViviLux

The new ViviLux™ from LEDengin is a high-efficiency, CRI 90 emitter and lens combination which leads the industry in luminous efficiency for high CRI light sources.

ViviLux produces over twice the center beam lux of a traditional LED array and reflector.

Lux on target is maximized, for downlighting and accent lighting where high quality illumination is demanded. The white light from ViviLux is bold, vivid, and energy-efficient.

A new Vivilux starter kit enables you to assemble a working light source equivalent to a 100W halogen or 35W metal halide bulb using a single high power LED and secondary optic.


02 September 2011

New Pacer USA LLC Website

Welcome to the new Pacer USA LLC website! The new design and layout should make it easier to find the products you are looking for - you can click on product images straight from the new-style home page, or use the product navigation menus. A complete list of our product categories is also available from the new home page.

We have also introduced product tables which can be dynamically filtered by key product parameters, such as size, power, brightness, wavelength and so on, to help you narrow down the choice of suitable products.

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We hope you find what you are looking for - but if you need to discuss your requirements don't hesitate to call on 866 375 6652.