Description
Pinholes – Mounted
Holmarc manufactures precision pinholes for spatial filtering and other similar applications. Standard pinholes are available in either copper or stainless steel substrates.

* Custom hole size can be provided.
HPRA – Series
Material : Copper
25 mm outer diameter
20 Micron thickness
Compatible with PHC – 3 pinhole cells
| Model No. | Size | |
| HPRA-3-5 | 5.0 μm +/- 1.0 μm | |
| HPRA-3-10 | 10.0 μm +/- 1 μm | |
| HPRA-3-15 | 15.0 μm +/- 1.5 μm | |
| HPRA-3-25 | 20 μm +/- 2 μm | |
| HPRA-3-50 | 25 μm +/- 2 μm | |
| HPRA-3-100 | 30 μm +/- 2 μm | |
| HPRA-3-200 | 35 μm +/- 2 μm |
PINH – Series
Material : Stainless Steel
25 mm outer diameter
20 Micron thickness
Compatible with PHC – 3 pinhole cells
| Model No. | Size | |
| PINH-5.0 | 5.0 μm +/- 1.0 μm | |
| PINH-10 | 10.0 μm +/- 1 μm | |
| PINH-15 | 15.0 μm +/- 1.5 μm | |
| PINH-20 | 20 μm +/- 2 μm | |
| PINH-25 | 25 μm +/- 2 μm | |
| PINH-30 | 30 μm +/- 2 μm | |
| PINH-35 | 35 μm +/- 2 μm |
PIN – H – Series
Material : Stainless Steel
9.35 mm outer diameter
20 Micron thickness
Compatible mounts available
| Model No. | Siz e | |
| PIN-H-025 | 0.25 mm | |
| PIN-H-050 | 0.50 mm | |
| PIN-H-075 | 0.75 mm | |
| PIN-H-100 | 1.00 mm | |
| PIN-H-200 | 2.00 mm | |
| PIN-H-300 | 3.00 mm |
Model No : PHC – 3
These pinhole cells are suitable for 25 mm dia. mounted pinholes. It can be used with rigid, kinematic, XY, XYZ and 5axis stages. The cell comes with standard RMS thread for fixing to various mounts.
Material : Aluminium
Finish : Black anodized

These apertures are made in aluminium substrate and finished by black anodizing. The aperture can be mounted to our standard RLM-25 lens mount.
Finish : black anodized
25 mm outer diameter
Compatible with RLM – 25 mount
| Model No. | Diameter D | |
| AS – 0.5 | 0.5 mm | |
| AS – 1 | 1 mm | |
| AS – 2 | 2 mm | |
| AS – 3 | 3 mm | |
| AS – 4 | 4 mm | |
| AS – 5 | 5 mm | |
| AS – 6 | 6 mm | |
| AS – 7 | 7 mm | |
| AS – 8 | 8 mm | |
| AS – 9 | 9 mm | |
| AS – 10 | 10 mm |
Compatible mounts are available for other standard / custom pinholes
Std Variable Round Aperture – SSID Series
Holmarc manufactures variable aperture in four different sizes. These are precision devices which offer near perfect circular apertures.
Leaves made of spring steel
Compatible with MSSID Series mounts
Black anodized finish for casing
Black zinc finish for leaves
| Model No. | Max Apreture | Min Apreture | D ( mm ) | Thickness ( mm ) | |
| SSID-12 | 12 mm | 0.8 mm | 19.8 | 5.0 | |
| SSID-25 | 25 mm | 0.8 mm | 37 | 5.5 | |
| SSID-37 | 37 mm | 1.2 mm | 53 | 6.0 | |
| SSID-50 | 50 mm | 2 mm | 70 | 7.5 |
These mounts are specially suited for Holmarc’s variable apertures. There is M6 tapped hole at the bottom for post mounting.
M6 mounting hole
Black anodized finish
Compatible with SSID series apertures
| Model No. | D ( mm ) | t ( mm ) | d ( mm ) | Suitable Aperture Model | |
| MSSID-12 | 19.8 | 8.0 | 35.8 | SSID-12 | |
| MSSID-25 | 37 | 8.5 | 53.0 | SSID-25 | |
| MSSID-37 | 53 | 9.0 | 69.0 | SSID-37 | |
| MSSID-50 | 70 | 10.5 | 86.0 | SSID-50 |
Stainless steel variable apertures and compatible mounts are available
Variable slits manufactured by Holmarc has micrometer drive which shows slit opening directly on the graduations.
| Model No. | |
| SVRA |
0-2 mm opening
Opens equally from center
Polished steel blades
Post mountable
Aluminum alloy construction
Black anodized finish
All the translation movements (Z axis stage as well as two X-Y positioners) are provided with preloaded ball bearing guide ways for play less and stick-slip free positioning.
| Model No. | |
| SFAS | |
| SFAS – VC |
Note: Pinholes and microscope objectives are sold separately
All the translation movements (Z axis stage as well as two X-Y positioners) are provided with preloaded ball bearing guide ways for play less and stick-slip free positioning.
| Model No | Connector Type | |
| LFC – 1 | Fiber Chuck (FC1) | |
| LFC – 1 FC | FC, Connector |
10 mm linear movement
Fiber Chuck / FC Connector Compatible
Compatible with std microscope objective
Post / base mountable
Black anodized finish

