Pin Holes (Aperture)
- Pinhole is a small circular hole through which light can be transmitted.
- Pinhole is a very fine circular indentation produced on a thin metallic foil.
- Pinholes range from mm to few microns.
Application Notes
- Spatial Light Filter: Pinholes are commonly used to spatially filter a beam, acting as a Low-pass filter for spatial filtering in the image plane of the beam.
- In Imaging: A pinhole is the simplest possible optical element for imaging; it can be used in a pinhole camera (camera obscura).
- Pinhole Uses: Laser Aperturing, Holography, Fibre-optic guides, spatial Filtering and various research-level optical experiments.