Polarising filter
Also known as polarizing filter, polariser, cross-polarisation, cross-polarization. Category: Lighting and optics
A polarising filter on the lens blocks light polarised in one direction, reducing reflections and glare from non-metallic surfaces such as glass, plastic and varnish. In cross-polarisation, polarising film on the lights and a filter on the lens are combined to remove reflections almost completely.
How PhotoRobot uses it
PhotoRobot's Object Capture tutorial suggests a polarisation filter, and if needed cross-polarisation, to reduce reflections that disturb photogrammetry, and PhotoRobot-ready camera kits are delivered including polarisation.
See on photorobot.com
Related terms
- Photogrammetry: Generating a 3D model from many overlapping photographs of an object.
- Reflector: A surface that bounces light back onto the subject to fill shadows; also the dish fitted to a light.
- Flag: An opaque panel that blocks light from reaching part of the scene or the lens.
Where this term appears on photorobot.com
Mentioned on 3 pages of photorobot.com:
- Recommended Cameras for PhotoRobot Systems (Manual)
Every recommended camera and lens choice is then delivered as part of a complete PhotoRobot-ready kit (with power cables, polarization, adapters, tested compatibility, and onboarding included). - How to Make a Simple 3D Model with Apple Object Capture API (Tutorial)
When this happens, it’s possible to reduce glare using a polarization filter on the camera. - How to Photograph Eyewear for Online Product Presentation (Tutorial)
It might still be necessary to experiment with light reflectors for glasses with polarized or mirror lenses.