A chrome-on-glass pinhole is a small circular transparent region in an opaque film. It defines a compact light source or spatial selection point while the glass supports the pattern. Arrays repeat this geometry at specified locations.
Specify optical glass or fused silica, overall dimensions, thickness, pattern-side orientation and the clear aperture. Define transmission, reflectance or optical density at the working wavelength when optical contrast is critical.
A pinhole pattern creates a small transmitted reference in an opaque film. It can serve as a point-like source or alignment feature in compatible optics, with the glass retained beneath the opening.
Optical references in measuring instrumentsDiameter, circularity and centre position are component quantities. Whether the opening behaves as a point source depends on its size relative to the system’s imaging resolution and wavelength.
Check alignment in the complete instrumentA chrome-on-glass pinhole is a small circular transparent region in an opaque film. It defines a compact light source or spatial selection point while the glass supports the pattern. Arrays repeat this geometry at specified locations.
Choose a single pinhole for a local optical reference or spatial filtering arrangement compatible with glass. Choose an array when several reference points, channels or repeated image locations are needed.
A clear pinhole transmits light within a blocked field; a dark dot blocks light within a clear field. A glass-supported pinhole also differs from a drilled or electroformed metal aperture because the substrate remains in the optical path.
Clear diameter, circularity, surrounding opaque area, array pitch and fiducials define the pattern. Substrate transmission and film optical density must be considered at the illumination wavelength.
A glass-supported aperture or aperture array with defined clear regions. The physical support stays continuous beneath the openings in the film.
A compact transmitted point for checking alignment and optical channel position.
No. The opening is in the film; light continues through the glass substrate.
Yes, if the illumination, coordinate geometry and feature detector are compatible. Bright apertures and dark dots may need different detection settings.
No. Wavelength, power density and exposure conditions affect suitability. Aperture geometry by itself establishes neither damage threshold nor laser-power handling.
Optical pinhole patterns form small transmitting points in an opaque film on glass for local optical paths and position references.
Define diameter and location at the film plane, then specify glass outline, thickness and the viewing face.
Aperture diameter, coordinates, polarity, substrate, active field and mounting geometry.
Multiple openings can be defined in the same artwork, each with a diameter, coordinate and spacing to form the required array.