Long Working Distance Objective Lens

◦Chromatic aberration is corrected in the visible range (400 − 700nm).
◦PAL/PAL-L has a long working distance and a corrected field curvature. Its natural observation image is obtained to the periphery of the visual field.

Guide

• This objective lens is supplied with a waveplate unit (λ/4).

• When observing specimens with low reflectivity, flare during coaxial illumination can be reduced by attaching the supplied waveplate unit (λ/4) to the tip of this objective lens and using it in combination with the Polarized Illumination Observation Unit (OUCI-3-PFU).

• Available fixed Objective Lens Holder（LHO-26）.

• When the objective lens is fixed to a 2-axis holder, please consult our Sales Division.

• For laser processing, we offer an Observation Unit with Coaxial Illumination (OUCI) and a Dichroic Case for Laser Introduction (DIMC).

Attention

• When an objective lens is used in laser processing, use the diameter of the incident beam to extend to a size of half the pupil diameter (1/e2). A small light spot cannot be achieved when the incident beam is too narrow. Please note if there is a laser energy density increase, there will be a high possibility of damage to the objective lens.

• The surface of an objective lens can be contaminated by debris during processing. To avoid this, please have sufficient working distance (WD) and insert a thin protective glass on the objective.

• Magnification is the value when using the imaging lens f=200mm. When used in a microscope lens barrel from other manufacturers there may be different magnifications. The actual magnification should be calculated from the ratio of the focal length of the objective lens and the focal length of the imaging lens to verify the focal length of the imaging lens barrel to be used.