Calcium Fluoride (CaF2) Lenses are made of calcium fluoride substrate. Calcium fluoride material has a wide transmission spectrum range (180nm-8.0μm), with high damage threshold, low fluorescence, high uniformity and soft physical properties, is used as a basis for a variety of optical components.

Brewster windows are uncoated substrates that can be used as polarizers in tandem, or to increase the degree of polarization of partially polarized light. When placed at a precise Brewster angle, it allows light of a specific polarization direction (P-polarized light) to pass through completely without reflection, while reflecting away another portion of the light (S-polarized light).

Parallel windows serve both a "protective" and a "transmission" function in optical systems. Two polished surfaces must maintain extremely high parallelism (usually expressed in arcseconds) to isolate the delicate internal optics from the complex external environment, allowing light to pass through without distortion, without altering the beam path or system imaging quality.

Coating on different optical surfaces, including spherical, aspherical, planar, etc., but how to better detect the performance of thin film? The usual landscape photometer detection systems are suitable for plane detection, from which the witness samples are derived. Through the witness sample, the transmittance, reflectivity, actual applicable temperature, moderate and so on of the film can be detected.

A crosshair reticle is a crucial reference element in optical instruments. It is essentially a transparent glass plate with finely etched crosshairs on its surface. Its core function is to provide a precise visual reference, primarily used for: aiming and alignment; measurement and calibration; positioning and centering; guiding and calibration.

The materials used in the astronomical telescope reflectors we supply typically meet the following requirements: 1. Low coefficient of thermal expansion 2. Low-stress birefringence 3. Fine annealing 4. Stable optical performance 5. Effective control of bubbles and streaks.