Optical components

Bertin Winlight makes high value-added optical components, ranging in size from just a few millimeters to 1.5 meters. Our temperature-controlled optics production plant spans some 2,200 square meters and is located in Pertuis, in the Vaucluse region of southeast France. We deploy both traditional and computer-controlled polishing (CCP) techniques, using both deterministic manufacturing methods (computer numerical control, or CNC) and traditional methods such as hand polishing to turn out high-quality components with minimal surface roughness down to 0.1 nm RMS.

Lenses, Mirors, Prisms

Bertin Winlight makes a wide range of optical components, including:

• Plano, spherical and on-axis or off-axis aspherical mirrors
• Lenses, prisms, portholes
• Cylindrical and toroidal mirrors
• Image slicers, thin slits, stepped mirrors
• Free-form optics

Bertin Winlight has mastered polishing techniques for all types of materials: low expansion coefficient (silica, Zerodur, ULE, etc.) and infrared (ZnSe, germanium, silica) optics, as well as optical-grade glass (Schott, Ohara, etc.), crystals (silica, Fluorine (CaF2), BaF2, etc.), ceramics (SiC) and metals (copper, aluminum, stainless and regular steel, Invar, etc.).

The degree of polishing precision also depends on the shape and size of the part in question. In addition, we have developed a proprietary technology for making image slicers, suited to volume production.

These slice type mirrors are produced with sharp edges (without bevels, chips or chamfers), which allows us to produce edges accurate to within a few microns. Bertin Winlight makes specific slicers for different formats (plane, curved, aspherical). This technology is perfectly suited to components for upcoming giant telescopes, in particular the Extremely Large Telescope (ELT), the Giant Magellan Telescope (GMT), etc.

Aspherical Mirrors (on-axis, off-axis, free-form)

Bertin Winlight makes on-axis or off-axis aspherical optics using innovative technologies that allow us to grind and polish parabolic optics directly off-axis without requiring a master parabola. Post-polishing steps are used on metallic mirrors machined with the diamond turning technique. All mirrors are then optically tested in configurations using null lenses or via direct interferometry tests.

Collimators, lenses, derotators

Bertin Winlight designs and manufactures a wide range of optical subsystems, such as:

• Collimators
• Lenses (cameras)
• ADC (Atmospheric Distortion Correctors)
• Derotators (internal reflection or mirrors)
• Prisms
• Folding mirrors
• Transport doublets
• Field splitters
• Fore optics

…Bare or mounted, in subsystems or assembled and adjusted.