Changchun Long Ze Precision Optics Co., Ltd.

Scanning mirrors in infrared systems and optical mirrors in various reflective optical systems need to be coated with high-reflection coatings. The highly reflective film has high reflectivity in the corresponding band. Physical and chemical properties of the film are stable. It resists the erosion of substances, such as moisture in the atmosphere. Under normal circumstances,  optical mirrors  are coated with high-reflective film using vacuum evaporation metal film technology. Metals such as gold, silver, copper, aluminum, and rhodium can be used as metal materials for infrared high-reflection films. Optical thin films of silver and copper are easily oxidized in the air and greatly reducing their reflectivity. Moreover, the adhesion of silver film to glass is worse than that of aluminum. The protective film is not easy to be plated firmly. Beryllium is expensive and toxic, so beryllium film is almost not used. At present, in infrared mirrors, the most widely used metal films are usuall

Concave lenses for eyeglasses Concave lenses are most often used to correct nearsightedness. In myopic patients, the eye is too long for images of distant objects to fall on the retina. Therefore, concave lenses are used in eyeglasses to correct this deficiency by spreading the light before it reaches the eye. This allows a person to see distant objects more clearly.   Used in lasers Different types of scanners, medical devices, CD and DVD players all use laser beams. Since laser beams are highly concentrated, they are spread out for the equipment to work properly. Small concave lenses are used to expand the laser beam to sharpen it into a specific area.   Used in cameras To improve the quality of photographs, combinations of convex and concave lenses are widely used by camera manufacturers. When only a convex lens is used as the main lens of a camera, it causes distortion in the photo, which is called chromatic aberration. By combining concave and convex lenses, these undesirable effe

A lens is a transparent material (glass or plastic) that has at least one curved surface. The shape of the lens causes light to bend in a specific way as it passes through the lens itself, either converging to a specific point or diverging from a specific point. Convex (converging) lens -- converges parallel light rays to a single point on the optical axis, on the opposite side of the lens.   Concave (diverging) lens -- diverges parallel rays. All light entering the lens diverges parallel to its optical axis.   Uses of convex lens For magnifying glasses One of the most straightforward and simple uses of a convex lens is a magnifying glass. When light enters the convex lens of a magnifying glass, it is focused on a specific focal point in front of the center of the lens. Once the magnifying lens is at the optimal distance. The focal point will reach the object and therefore will produce the maximum magnification of the object.   Convex lenses for eyeglasses A person may become farsighte

You know that a mirror is an object with a surface that has a good specular reflection. That is, it is smooth enough to form an image. The most familiar type of mirror is a flat mirror, which has a flat surface. Curved mirrors are also used to produce a magnified or reduced image or to focus light or simply distort a reflected image.   The choice of coating can enhance or diminish the emissivity or reflectivity of a mirror. Metal plating is the most common form of mirror coating. Many metals, from gold and zinc to copper and platinum, can be used for coatings. Aluminum coatings can provide unique advantages and improve the functionality of optical mirrors. Determining Optical Reflector Performance When selecting a coating for your optical reflector, you want to be sure that the proper plating is applied for the intended application. Determining the most applicable choice involves understanding how the properties of the various metal finishes will affect the mirror's performance. Tw