Concave mirrors-Quality grade

Concave Spherical Mirrors are used for focusing a beam of light in an optical system, therefore replacing a lens where a folded path is necessary. Compared to lenses, spherical mirrors have the advantages of perfect achromatism, considerably lower spherical aberration and wide wavelength coverage.

Elliptical plane mirrors

These Elliptical Plane Mirrors are available in two grades, a general-purpose grade for less demanding systems or a (λ/4) grade with guaranteed flatness and parallel tolerances for more demanding applications. Elliptical Plane Mirrors are typically used at 45° where a circular cross section of a given size is asked for. They are used as secondary mirrors in Newton telescopes or mounting in a tube where maximum aperture is required.

Concave lamp reflectors

These Concave Spherical front-surface Reflectors of very wide aperture are mainly intended as back reflectors for lamphouses. These are positioned with the lamp at the centre of curvature and form a same-image which can be superimposed on the source or positioned just beside it.

Precision plane mirrors

These Precision Plane Mirrors are available in two grades (λ/10) and (λ/4) with guaranteed flatness and parallel tolerances. These Precision plane Mirrors are suitable for interferometry and other demanding applications. Low-expansion glass (see materials section) is used for the (λ/10) series to reduce thermal distortion.

Plane Mirrors

Mirrors are used to fold or bend the optical path in a system. Before selecting a mirror the application must be considered, thermal and mechanical stability as well as flatness are important in selection. We supply a range of mirrors covering a range from UV-Visible-IR applications and surface specifications. These Plane Mirrors are offered in two grades either as General-purpose Grade or with guaranteed flatness of 1 λ over 25mm.

General-purpose Grade Mirrors

These are generally on float glass substrates have a wide variety of usages. 1.1mm thick mirrors are useful for their low inertia in scanning systems whilst 3mm and 6mm thick mirrors have better flatness and are useful for camera, microscope or projector systems and illumination and sensing applications.

Plane 1 λ over 25mm Mirrors are available in a wide range of sizes at very reasonable prices, made possible by bulk preparation of the material.