功能

• A special filter is an optical device that removes distorted wavefronts and noise from the laser and allows the beam to diverge with clean spherical waves. This is a holder with a functionally graded function added to the special filter mechanism.
• This is useful when the laser is not installed horizontally or when the incident beam is inclined.
• The objective lens has a screw-type linear stage that adjusts the position of the focusing point, and the pinhole has a cross-motion holder that adjusts the position in the plane, allowing the spot light of the laser to pass through the pinhole.
• When combined with a low-aberration achromatic lens, plane waves with a large beam diameter can be obtained.
• We also offer a special filter (SFB) that emphasizes stability.
• * If you move the tilt adjustment after adjusting the objective lens and the pinhole, there will be no light passing through the pinhole, and you will need to re-adjust.
• * Fix the pinhole with the non-engraved side facing the screw ring side. If you stop it on the opposite side, the objective lens and the pinhole may interfere and you may not be able to secure enough movement for adjustment.