|Type||Rod Lenses||Material||UV fused silica, BK7 or other optical glass|
|Diameter Tolerance||down to +/-0.01mm||Roundness Error||dowun to 0.005mm|
|Length Tolerance||±0.1mm||Surface Quality||60/40 S/D|
Rod Lenses are optical lenses in the form of a round rod and focus collimated beams into one dimension. Light is transferred against the circumference of the lens, therefore the circumferences of the rod lenses are precision polished, whilst the two flat ends are irrelevant to optical processing, but could be ground also. The uses of rod lenses include collimation of divergent light, linear focusing, and image inversion lenses between the objective and the ocular lenses in a rigid endoscope (An medical instrument to observe inside human bodies). A rod lens could also be utilized as a light pipe (An optical component that transfers light between the flat ends using total inter reflection.)
Hangzhou Shalom EO offers a series of custom Rod Lenses made from various optical materials such as, but not limited to UV Fused Silica, N-BK7. The transmission of our rod lenses extends from UV, Visible, to NIR. Our rod lenses feature industrial-grade polished mantle (60/40 S/D), that are competent for being applied as endoscope lenses, light pipes, and laser processing lenses. Custom coating options for rod lenses include uncoated substrates, Broadband Anti-reflection (BBAR) coatings that effectively reduce reflection (average reflection below 0.5%) over a certain wavelength range, and laser line V-coating which provides higher transmission (average reflection below 0.25%) at a narrower range around a certain wavelength, and MgF2 AR coatings (average reflection below 1.5%) with competitive low price.