Kowa Lens Microscope Objective Lens LM35XC

Kowa Lens Microscope Objective Lens LM35XC

The 4/3" megapixel XC lens series provides a large image format of Φ23mm(C-mount). These high precision aspherical lenses greatly reduce distortion and produces a high definition picture. XC lenses maintain megapixel resolution thoughout the entire image even if the iris is fully open. In addition, Kowa's wide-band multi-coating effectively reduces glare and refraction.
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UV Plan Apo   50X

50X UV Plan   apochromatic objective,N.A.0.43mm;W.D. 14.81mm, Focal   Length4mm,resolution0.64μm; depth of focus 1.49μm, FOV  0.48mm(24eyepiece),visual field   0.10×0.13mm(1/2CCD); transmittance:450nm-700nm>70%,   345nm-365nm >90%(achromatic wavelength 355nm)

The information of the lens 

The oldest certain reference to the use of lenses is from Aristophanes' play The Clouds (424 BC) mentioning a burning-glass. Pliny the Elder (1st century) confirms that burning-glasses were known in the Roman period. Pliny also has the earliest known reference to the use of a corrective lens when he mentions that Nero was said to watch the gladiatorial games using an emerald (presumably concave to correct for nearsightedness, though the reference is vague).Both Pliny and Seneca the Younger (3 BC–65) described the magnifying effect of a glass globe filled with water.

 Ptolemy (2nd century) wrote a book on Optics, which however survives only in the Latin translation of an incomplete and very poor Arabic translation. The book was, however, received, by medieval scholars in the Islamic world, and commented upon by Ibn Sahl (10th century), who was in turn improved upon by Alhazen (Book of Optics, 11th century). 

Information of the optical amplifier

An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. An important practical goal is to develop an amplifier adequate for use as an optical repeater in the long distance fiberoptic cables which carry much of the world's telecommunication links. Existing fiberoptic repeaters must convert the light beam to an electronic signal to amplify it, then convert it back to light.