Spherical lenses are used for beam focusing and beam expansion. Our precision lenses start with optical materials designed for high transmittance over the desired spectral range. Careful consideration is given to create lens shapes with high surface accuracy and surface quality.
A "spherical lens" is a lens whose surface has the shape of (part of) the surface of a sphere. On this page, we will determine some values for the focal length of a spherical lens. It include plano convex lens, plano concave lens, meniscus lens, Achromatic Lens
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Deluge valve is mainly composed of water source control valve (butterfly valve), deluge valve, manual emergency device, automatic drip valve, drain ball valve, water supply side pressure gauge and control chamber pressure gauge. When a fire occurs, the fire control module linkage action, open the solenoid valve, through the control cavity outlet connected to the atmospheric pressure, due to the control of the import of the decompression device within the role of the control chamber so that the pressure dropped sharply, when the control cavity When the pressure is lower than the water supply pressure, the upward force acting on the bottom of the bonnet is greater than the downward force of the lever acting on the valve flap. The flap of the deluge valve is opened by the pressure of water supply, and then the water flows into the system side to extinguish the fire and control The pressure gauge in the chamber is controlled by the fire detection system installed in the protected area and also the drive system of the deluge valve disc. It can be electrically, hydraulically (wet) or pneumatic (dry).