Optomechanics
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
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
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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
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