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Spatial Filter Mounts
SFAS Series
Industrial Grade
Laser Fiber Coupler
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The Holmarc SFAS Series Spatial Filter Mount / Laser Fiber Coupler is an industrial-grade, multi-axis kinematic positioning assembly designed for laser beam spatial mode cleaning, wavefront purification, and precision optical fiber coupling. Integrating independent XY positioning stages for both optical elements and a 10 mm axial (Z) travel drive, the unit effectively strips high-frequency optical noise, diffraction fringes, and scratch-dig scatter to deliver an ideal TEM00 Gaussian profile..

Compatible Accessories & Product Catalog Numbers

Product Category Interface / Compatibility Holmarc Catalog Part Numbers
Microscope Objectives Standard RMS thread; compatible with commercial DIN/JIS objectives MO-4X (4X / 0.10 NA), MO-10X (10X / 0.25 NA), MO-20X (20X / 0.40 NA), MO-40X (40X / 0.65 NA), MO-100X
Mounted Precision Pinholes Standard Ø 25 mm (1.0") outer diameter cells; 20 µm stainless steel foil HPRA-Series: HPRA-3-5 (5 µm), HPRA-3-10 (10 µm), HPRA-3-15 (15 µm), HPRA-3-25 (25 µm), up to HPRA-3-200 (200 µm)
Pinhole Retaining Cell Dedicated Ø 25 mm optical housing cell Model PHC-3 ( Ø25 mm outer diameter replacement / custom pinhole housing cell )
Mounting Accessories M6 optical grid breadboard tables or posts Holmarc PS Series Posts ( Ø12, Ø12.7, Ø16 mm ) & PH Series Pedestal Post Holders

Fig 2 : Optical Ray-Path Schematic Through Holmarc SFAS Spatial Filter Assembly

Laboratory Alignment Sequence

        Step 1 (Centering) : Thread objective without pinhole installed; adjust Objective XY stage until beam is centered on optical axis..
        Step 2 (Pinhole Mount) : Insert Ø 25 mm pinhole cell into retaining barrel and secure with threaded ring.
        Step 3 (Transverse Alignment) : Adjust Pinhole XY stage to center aperture on focused beam waist until transmission emerges.
        Step 4 (Axial Optimization) : Translate the 10 mm Z-drive along optical axis to position pinhole at exact focal waist, maximizing power.

Fig 3 : Transverse Beam Profile Comparison - Unfiltered Input vs. Spatial Filtered Output

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Established in 1993, Holmarc Opto-Mechatronics Ltd manufactures variety of scientific and engineering instruments for research, industry and education.

ISO 9001:2015 Made in INDIA

CIN : L33125KL1993PLC006984
GST No : 32AAACH9492C1ZQ

Get in Touch

    B.7., H.M.T. Industrial Estate H.M.T. P.O, Kalamassery, Kochi Kerala, India - 683 503
   +91 920-719-7772 / 6 / 1
   sales@holmarc.com
   Mon - Sat : 9 am to 5 pm
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