# Optical glass plate > A turntable top made of optical glass that can be lit and photographed through, giving shadow-free images. Also known as: glass turntable, glass plate. Category: Hardware. An optical glass plate is a transparent turntable top made of hardened optical glass. Light can pass through it from below, so the product casts no shadow on the plate, and the camera can photograph the underside of the product through the glass. ## How PhotoRobot uses it PhotoRobot uses optical glass plates on the [Centerless Table](https://www.photorobot.com/robots/centerless-table) (850 or 1300 mm), the [CASE 850](https://www.photorobot.com/robots/case-850), the C-Class turntables and [FRAME](https://www.photorobot.com/robots/frame). Together with a diffuse background they let the software separate the product from the background without clipping, and photographing through the glass supports [photogrammetry](https://www.photorobot.com/glossary/what-is-photogrammetry-in-product-imaging) 3D models. ## Related terms - [Centerless Table](https://www.photorobot.com/glossary/centerless-table): PhotoRobot motorised turntable with an optical glass plate for shadow-free photography without clipping. - [Shadow-free photography](https://www.photorobot.com/glossary/shadow-free-photography): Lighting a product so that it casts no visible shadow on its background or support. - [CASE 850](https://www.photorobot.com/glossary/case-850): PhotoRobot's portable motorised turntable with an 850 mm glass plate that folds into its own carrying case. - [FRAME](https://www.photorobot.com/glossary/frame): PhotoRobot all-in-one machine combining a glass-plate turntable with a robotic camera arm, built for 3D modelling. - [Background removal](https://www.photorobot.com/glossary/background-removal): Separating the product from its background so it can be placed on pure white or transparency. ## Where this term appears on photorobot.com Mentioned on 51 pages. Most relevant: - [PhotoRobot CASE 850 Portable Studio User Guide](https://www.photorobot.com/manuals/case-850-user-guide): The 850 mm glass plate is perfect for pure white background photography. - [PhotoRobot Frame Turntable Assembly & User Guide](https://www.photorobot.com/manuals/frame-assembly-user-guide): It is possible for the camera to photograph from below the glass plate of the turntable or above as well. - [FRAME](https://www.photorobot.com/robots/frame): The turntable features an optical glass plate, enabling image capture from above or below the glass. - [CASE 1300](https://www.photorobot.com/robots/case-1300): 1300 mm hardened optical-glass plate, diffusion background, several automatic product-positioning lasers, high motor-power, remote control, API, reflection boards and flag holders - all in easily… - [PhotoRobot MultiCam and Centerless Table Installation Guide](https://www.photorobot.com/manuals/multicam-centerless-table-installation): At the same time, the turning glass plate holds objects from the size of an earring to luggage, with a diffuse background that enables even lighting of objects from all sides during photography. - [eCommerce Photography - How to Optimize Production](https://www.photorobot.com/blog/ecommerce-photography): This is thanks to a unique lighting system, an optical glass plate, and diffuse background to light products from all sides. - [PhotoRobot’s Case for Automated 360 Product Photography](https://www.photorobot.com/blog/case-for-automated-360-product-photography): From the optical glass plate and the diffuse background, to the arcs for camera support and the tools for precise remote control of the robot, the Case truly is *everything in a single case* for… - [Pricing Levels of Robotic Workspaces](https://www.photorobot.com/hardware-pricing): FRAME Fx FRAME Next-gen all-in-one industrial-grade photographic automat with glass plate ⌀ 1 300 mm. - [PhotoRobot Centerless Table CL1300 & CL850 User Guide](https://www.photorobot.com/manuals/centerless-table-user-guide): Key technological components and features of the PhotoRobot Centerless Table include: Optical turning glass plate for shadow-free image capture. - [CASE 850](https://www.photorobot.com/robots/case-850): The Case features an 850mm optical glass plate, offering sufficient workspace for small to medium size products.