Kowa Lens Microscope Objective Lens LM35LF

Kowa Lens Microscope Objective Lens LM35LF

Kowa's 4k line scan lenses are ideal for high resolution, low distortion, and close distance surface inspection using line scan cameras. This series offeres six lens options with focal lengths ranging from 28mm to 50mm.
Chat Now

Product Details

QQ截图20171109230132.jpg2.jpg

History of the Nimrud lens

 The word lens comes from lēns , the Latin name of the lentil, because a double-convex lens is lentil-shaped. The lentil plant also gives its name to a geometric figure.

 Some scholars argue that the archeological evidence indicates that there was widespread use of lenses in antiquity, spanning several millennia.The so-called Nimrud lens is a rock crystal artifact dated to the 7th century BC which may or may not have been used as a magnifying glass, or a burning glass. Others have suggested that certain Egyptian hieroglyphs depict "simple glass meniscal lenses".

 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.

Related product information

ZY-20XD

UV Plan Apo   20XD

20XD UV Plan   apochromatic objective,N.A.0.45mm;W.D. 16.7mm, Focal   Length10mm,resolution0.61μm;depth of focus 1.36μm,FOV  1.2mm(24eyepiece),visual field   0.24×0.32mm(1/2CCD); transmittance:450nm-700nm>70%,   770nm-790nm>90%(achromatic wavelength 355nm)

Inquiry