Just like fiber, LEDs have their weak points. As you will probably notice, the weak points of each technology can be offset by one another.

LightPath Technologies

ISP Optics Corporation is a vertically integrated manufacturer offering a full range of the infrared products from high performance MWIR and LWIR Lens Assemblies to catalog and custom infrared optical elements. Our infrared IR Lens Assembly product line includes dual FOV and fixed focal length lenses for cooled and uncooled cameras including designs targeted for light weight and compact models. ISP Optics manufactures in-house precision optical components including spherical, aspherical and diffractive coated IR lenses. In addition to our built-to-print optical elements product line, we also offer custom optomechanical assemblies, coatings and diamond turning services along with IR catalog optics. We manufacture optics from various infrared crystals such as: Ge, Si, ZnS, ZnSe, CaF2, GaAs, BaF2,IG2, IG4, IG5, IG6, Amtir, GASIR and others. FTIR materials are grown in-house including NaCl and KBr to manufacture build-to-print optical elements for the FTIR market and KBr lenses for wideband imaging applications. Our manufacturing processes utilize CNC grinding, diamond turning, continuous and conventional polishing, optical contacting, advanced coating and design technologies to deliver consistent top quality solutions that serve the growing industry demands with an unwavering commitment to our world-wide customers.

Edmundoptics isp

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First conceived in 1962 by Nick Holonyak Jr., continuous improvement of the light emitting diode (LED) made this electronic device a more relevant, less expensive alternative to fiber optic and other types of lighting technology.  The LED was first widely available in its red incarnation, which suited some vision applications; those working with monochromatic (B&W) cameras.

Today, most general vision applications prefer the less expensive, longer lasting, and effective lighting produced by LEDs. However, for several reasons listed above, fiber optic lighting is still the preferred lighting source.

To implement this new strategy, engineers realized that shaped lighting, specifically, fiber optics, optimized contrast, producing optimized resolution accuracy and overall performance, while avoiding illumination where it was not needed.

LightPathoptics

However, the device was largely unsuited for any color evaluation and so had limited use. In 1996, the first “white” LED was offered for sale. The chip emitted what appeared to be white, bright light, but in essence, was a blue LED doped with phosphorus appearing to emit white light. Regardless of the technical trickery, in 1996, LED technology forever seated itself as a viable replacement technology for fiber optic lighting in vision applications for the following reasons:

Manufacturing Standard and Custom fiber optics for Industrial, Medical, Commercial, Military and Machine Vision applications since 1977.

As vision technology evolved in the late 1990s, lighting became recognized as a key to solving marginal or unworkable vision applications by selectively controlling contrast in the field of view (FOV). Hard to see features were more readily resolved, which improved processing speed and accuracy.

When the vision industry was just a fledgling niche technology, everyone invested all their time in software and video technology. Nobody ever considered the role lighting plays in application effectiveness. Any type or method of lighting would do; the camera coupled with the software would distinguish important features and the computer would perform the proper function.