31results about How to "Guaranteed luminous flux" patented technology

The invention discloses a method for extending a view field of an infrared optical system on the basis of wavefront coding. The method comprises the following steps that an odd symmetric phase mask plate is additionally arranged at a diaphragm of the infrared optical system, wavefront of the infrared optical system is modulated, a coded image is formed on a detector, decoding processing is conducted on the coded image through a digital filter means, and a final sharp image is obtained. By introducing a wavefront coding technique, the larger focal depth purpose can be achieved on the condition that the luminous flux and the imaging resolution of the infrared optical system are guaranteed, and meanwhile astigmatism, spherical aberration, chromatic aberration and aberration brought by defocus caused by installation errors and temperature changes can be inhibited. According to the method, operation is easy, and the view field of the system can be extended and the image quality can be improved on the condition that the complexity of the infrared optical system is not increased.

The invention relates to the technical field of a deep ultraviolet LED, and provides an inorganically-integrated deep ultraviolet LED package structure. The inorganically-integrated deep ultraviolet LED package structure comprises a ceramic substrate, an LED chip and a glass cover plate, wherein a metal support is fixedly arranged at the top of the ceramic substrate, a groove is formed in the topof the metal support, the LED chip is fixed in the groove, a wavelike clamping groove is annularly formed in an inner wall of the groove, a frame is hermetically clamped outside the glass cover plate,and a wavelike elastic clamping sheet is fixedly arranged at the top of the frame and is clamped into the wavelike clamping groove in a matching way. The inorganically-integrated deep ultraviolet LEDpackage structure is used for solving the problems of poor aging resistance, poor sealing performance, poor cooling effect and influence in service lifetime of the deep ultraviolet LED of an organicpackage structure in the prior art.

The invention provides a protection circuit for an LED light fixture. The protection circuit for an LED light fixture includes a temperature control protection circuit, a high voltage open circuit and an LED connection circuit, wherein the LED connection circuit is formed through series-parallel connection of LED chips; the temperature control protection circuit is arranged on an LED lamp panel, and comprises an LED driver chip U2, a thermistor NTC1 and an MOS transistor Q2; the high voltage open circuit includes a controllable precision stabilized power supply U1 and an MOS transistor Q1; the temperature of the LED lamp panel can be measured by the thermistor; the magnitude of the LED output current can be controlled through temperature variation; and the output power is suitably adjusted to reduce heat generation of LED so that the luminous flux and the service life of the LED can be guaranteed maximumly. When the input voltage of an external power supply VCC is greater than 36V and the potential of the reference electrode of the controllable precision stabilized power supply U1 is greater than 2.5V, the controllable precision stabilized power supply U1 is conducted and the MOS transistor Q1 is disconnected and the input high voltage is added to the MOS transistor Q1 so that high voltage protection is formed on other components in the circuit.