This non destructive testing flashlight features a high intensity 365nm UV LED which shines through a specialized aspheric lens to create a uniform field of ...

Nonimaging optics

Because the light source is not focused at the sample, the light behaves as an extended diffused source. The combination of the apertures of both diaphragms determines the numerical aperture of the microscope system. As the CD is increased, the NA also increases thus creating higher resolution on the system.

2008729 — Ultraviolet (UV) light is part of a family of radiations called the electromagnetic (EM) spectrum. UV is just beyond the violet end of visible ...

In the case of microscope design, the optical engineer’s goal should be uniform illumination across the whole sample. Uniform illumination has the additional advantage of creating higher contrast. One way to create such illumination is by using what is called a Koehler illumination system. To create a Koehler illumination setup, we need two adjustable diaphragms: one near the light source (also called condenser diaphragm or CD) and the other close to the sample (also called field diaphragm).

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When designing any optical system, an optical engineer needs to consider how illumination will be used: specifically, how the illumination could affect the way the image is created. If not carefully designed, some illumination systems may create a kind of vignetting where the illumination will have a higher intensity at the center while decreasing to zero around the edges. Alternatively-as in the case of simple microscopes that are illuminated by halogen bulbs – the microscope can create an image of the lightbulb itself.

Criticalillumination

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LightPath Technologies, Inc. designs, develops, manufactures, and distributes optical components and assemblies. It offers precision molded glass aspheric ...

With over 20 years of experience and 800+ unique optical systems designed, Optics for Hire specializes in advanced optical engineering. If it uses light, we've worked on it.

20241130 — ... reflector, although not as efficient, lasted longer. The best metallic reflectors available in 1820 were constructed of heavily silvered ...

With over 15 years of experience and 500+ unique optical systems designed, Optics for Hire specializes in advanced optical engineering. If it uses light, we've worked on it.

In optics, the distance from the middle of the lens to its focal point. Light rays run in parallel to one another, while lenses distort light rays.

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By adjusting the condenser diaphragm, the optical engineer can modify the sample contrast and depth of field. In addition, we can control the amount of light reaching the sample. The collector lens projects a larger image of the lamp filament where the field diaphragm is placed. By controlling the CD’s aperture, we can control the angular aperture of the light cone. The field condenser (FD) can control the illumination area on the sample.

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Light Intensiy Meter. Measures the visible light produced by fluorescent lamp, metal-halide lamp, high voltage sodium lamp or electric incandescent lamp ...