AS ONE Near Infrared Objective Lenses PAL Series

[Features]
· A high NA objective lens with infinite correction function used for femtolasers (770 to 790 nm) and YAG laser (1,064 nm) processing.
· As it is designed to suppress aberration in the visible range, the processed surface can be observed on the same axis as the laser beam.
· With a large working distance (WD), natural observational images can be obtained right up to the periphery of the visual field by compensating for the curvature of the field.
· An objective lens used for coaxial observation systems, optical systems using lasers, etc., using infinity compensation.
· The near infrared objective lens (PAL-20-NIR(780)-LC07/PAL-50-NIR(780)-LC07) shows the highest performance for transmission through glass substrate (0.7 mm), assuming an LCD treatment.
· It can also be used for observing infrared light.
· PAL-20-NIR-HR-LC00/PAL-50-NIR-HR-LC00 include a protective glass unit (glass thickness: 1.8 mm).
· Can be used to protect the objective lens from spray scattered from laser processing.
· The protective glass in the protective glass unit can be replaced.
· Various objective lenses can be used with pulsed lasers, even in the visible light range (532 nm).
· For each lens, the laser strength (reference value) at the wavelength of 532 nm is 0.1 J/cm^2. (Note: Pulse Width 10 ns, Repetition Frequency 20 Hz)
· 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.
· * Pulse width may expand if a femtosecond laser beam of 100 fs or less enters.
· * 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.
· * PAL-20-NIR-HR-LC00/PAL-50-NIR-HR-LC00 is designed to take into account the thickness of the attached protective glass.
· * It is not possible to achieve the specified performance if the protective glass is removed.
[Product Specifications]
· Magnification: 20x
· NA : 0.45
· Working distance WD: 20 mm
· Focal distance f: 10 mm
· Resolution: 0.6 μm
· Focal Depth: ±1.4 μm
· Pupil Diameter: φ9.0 mm
· Camera Field of Vision (1/2 type): 0.24 x 0.32 mm
· Laser Yield Strength: 0.2 J/cm2, Wavelength: 1,064 nm
· Mass: 0.44 kg
· * Laser Pulse Width 10 ns, Repetition Frequency 20 Hz