기능

• With a simple shape, collimated laser light can be spread.
• It can be used in combination with a convex lens to increase the beam diameter or the illumination area.
• It is a lens made of synthetic quartz that can be used with ultraviolet light below 350 nm and has high laser resistance.
• It can be selected according to your specifications from a wide range of variations, subdivided by outer diameter size and focal length.
• * The concave lens cannot collect light or tie a real image by itself.
• * Use in combination with convex lenses.
• * Spherical flat concave lenses have chromatic aberration, and the focal length depends on the wavelength.
• * Flat concave lenses allow light to enter.
• * Allow parallel light to enter from the concave side.
• * Doing the reverse operation will cause spherical aberration to increase, which may result in poor optical performance of the optical system.
• * When a high-energy pulsed laser is used, there is a possibility that the reflected light on the concave surface will cause a condensation point to be connected to the optical path, causing a spark. When using with a pulsed laser, make sure that the laser beam is incident from the plane side.