Long Working Distance Objective Lens (Same Focal Length 45 mm), EPL Series
Part Number: 61-6928-04

[Features]
· A long-operation objective lens used for coaxial observation systems, optical systems using lasers, etc., with a parfocal distance of 45 mm using infinity compensation.
· As well as microscope observations of separated photographic subjects, it can be used for concentrating visible laser light.
· Chromatic aberration is corrected in the visible range (400-700 nm).
· EPL/EPLE feature a lightweight finish and can improve the response speed of objective lens drive mechanisms (SFS-OBL/SFAI-OBL) using auto focus, etc.
· A fixing type objective lens holder (LHO-26) is available.
· An observation unit with coaxial illumination (OUCI-2) and dichroic mount for laser introduction (DIMC) are available as lens barrels for laser processing.
· * Widen the incident beam to half the pupil diameter (1/e^2) if using the objective lens for laser processing.
· * A small condensed light spot cannot be achieved if the incident beam is too thin.
· * Also, high laser energy concentration may damage the objective lens.
· * If using the objective lens for laser processing, there is a chance that the objective lens front surface may become dirty due to spray from the processing work.
· * Use after ensuring sufficient working distance (WD) or inserting thin protective glass to protect the objective lens from dirt.
· * The magnification is the value taken when using the imaging lens f = 200 mm.
· * The magnification may differ if used with microscope lens barrels from other manufacturers.
· * Calculate the actual magnification by checking the focal distance of the imaging lens of the lens-barrel to be used and the ratio between the focal distance of the imaging lens and that of the objective lens.
[Product Specifications]
· Magnification: 5x
· NA : 0.13
· Working distance WD: 11.6 mm
· Focal distance f: 40 mm
· Resolution: 2 μm
· Focal Depth: ±16.3 μm
· Pupil Diameter: φ10.4 mm
· Camera Field of Vision (1/2 type): 0.96 x 1.28 mm
· Mass: 0.09 kg

Specificationtitle

• Focal Length(mm)

  20

• Weight(g)

  90

• Magnification

  10 times

• NA

  0.3

• Working distance (WD)

  6.4mm

• Resolution

  0.9μm

• Focal depth

  ±3.1μm

• Pupil Diameter

  ø 12mm

• Camera Field of View (1/2 Type)

  0.48×0.64mm