Near Ultra-violet (NUV) Objective Lens 4mm Focal Length 50x

PAL-50-NUV-B

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This objective lens can be used for laser machining using pulsed laser of THG (355nm) YAG laser. Chromatic aberration is suppressed in both the visible and UV laser wavelength, achieving a high transmittance.

Details

With its long working distance and field curvature corrected, its natural observation image is obtained to the periphery of the visual field.
With its long working infinity correction function; this objective lens can be used for a laser system and coaxial observation.
It is also used for the observation of near ultra-violet light.
This objective lens can be used with a pulse laser of visible light (532nm).
Laser Damage Threshold (Typical) 0.05J/cm² (355nm), 0.1J/cm² (532nm) (Laser pulse width 10ns, repetition frequency 20Hz)
High resolution type (NA=0.65) is also available.

More Information

More Information
Name	Near Ultra-violet (NUV) Objective Lens 4mm Focal Length 50x
Weight	0.3600kgs
Standard Coatings Available	No
Guide	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 and a Dichroic Case for Laser Introduction.
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.
Magnification	50×
Numerical Aperture	0.45
Working Distance WD	15.1mm
Focal length f	4mm
Pupil diameter	φ3.6mm
Resolution	0.61μm
Focal depth	±1.4μm
Real field of View (Eyepiece φ24mm)	φ0.48mm
Real field of View (Imaging device 1/2-inch)	0.10×0.13mm
Laser Damage Threshold	0.05J/cm² at 355nm

In stock

SKU

PAL-50-NUV-B

€4,878.13