42 results about "Lead exposure" patented technology

The invention provides an ultraviolet LED exposure machine optical exposure illumination system and an ultraviolet LED exposure machine adopting the system. The system comprises at least one light source mounting plate, a collimation lens, and an exposure illumination matrix arrangement device used for fixing the distance of the collimation lens and the light sources on the light source mounting plate. Multiple rows of ultraviolet LED light sources are sequentially arranged with equal spaces on the light source mounting plate. A distance between centers of two adjacent ultraviolet LED light sources in each row is A, a distance between centers of ultraviolet LED light sources in adjacent rows and in a same column is B, and B=A / row number. Every two adjacent ultraviolet LED light sources are arranged with equal spaces. According to the invention, the improvement on exposure uniformity and the reduction of light source divergence angle are adopted as basis. Phenomena such as non-uniform line thickness, inconsistent resolution on an entire plate, or broken line caused by non-uniform irradiation of the optical exposure illumination system are avoided.

The invention relates to a UV-LED exposure light source system comprising an exposure light source module, an alignment light source module, a light mixing system, a beam splitter and an optical system that are arranged along an optical axis, and further comprising a sensor and a control unit. The exposure light source module includes a plurality of ultraviolet light LED light sources of differentwavelengths for generating multiple ultraviolet light of different wavelengths for exposure. The alignment light source module includes at least one visible LED source for generating at least one visible light for alignment. The light mixing system mixes the ultraviolet light into a mixed light. The beam splitter splits the mixed light into a main light and a split light. The optical system illuminates the main light and visible light from the alignment light source module on a reticle. The sensor detects the energy of the light of each wavelength in the splitting. The control unit controls the opening and closing of the ultraviolet light LED light sources of different wavelengths, and can adjust the light output of the ultraviolet light LED light source of the corresponding wavelength according to the detection result of the sensor.

The invention provides a radiogram marking machine and marking method. The radiogram marking machine comprises a transformer used for converting high-voltage alternating current into low-voltage direct current; two ends of the transformer are respectively connected with a power supply and a microswitch; the microswitch is connected with a time relay; the time relay is connected with a light modulator; the light modulator is connected with a LED exposure lamp and a signal lamp; an exposure screen is arranged to face the LED exposure lamp; and one side of the exposure screen is provided with a spring bearer plate used for positioning a marking scope and triggering the microswitch. The invention also provides a radiogram marking method. According to the method, a radiographic testing photograph having undergone exposure is subjected to secondary exposure to visible light so as to mark the photograph with a marking; after exposure to rays, the photograph still has unreacted ions; and the exposure screen gives off character-shape light rays to irradiate the film base of the photograph, so compounding of the unreacted ions is promoted and imaging is realized so as to accomplish marking of the photograph. The radiogram marking machine provided by the invention is simple in structure, convenient to install and maintain and low in price, and improves the production efficiency of ray detection and the automation level of flaw detection.

Disclosed is an image forming apparatus composed of a combination of multi-layered electrophotographic photoreceptor wherein an undercoat layer is made of at least fine titanium oxide particles and a binder resin and has a thickness of 3 μm or less and the fine titanium oxide particles are surface treated with alumina and silica and have a number average primary particle size of 20 nm or less, and exposing means by LED exposure. Thus, an electrophotographic photoreceptor having good balance between dispersibility of titanium oxide and electrical insulation properties is obtained and image fog does not occur under high temperature and high humidity environment and also excellent image quality can be maintained during continuous printing under low temperature and low humidity environment.

The invention relates to an LED (Light Emitting Diode) luminous lamp. The LED luminous lamp comprises a frame body, wherein the frame body is at least internally provided with an LED exposure-prevention device, wherein the LED exposure-prevention device comprises a plurality of reflection bars which are arranged on the frame body and connected with two sides of the frame body; the reflection bars are vertically arranged, and the distances between the adjacent reflection bars are equal; each reflection bar is provided with a reflecting device; the reflection bar comprises an upper reflection bar and a lower reflection bar; the upper reflection bar and the lower reflection bar are connected together, and an included angle is formed between the upper reflection bar and the lower reflection bar; a supporting rod is arranged in front of the reflection bar; both ends of the supporting rod are connected with the two sides of the frame body; the supporting rod is provided with a plurality of LED lamps which are arranged in order and at equal intervals; a light source of each LED lamp faces to the reflection bar; and the distance between the adjacent reflection bars are between 1 cm and 2 cm. Compared with the prior art, a bather can keep ventilation with outdoors when taking a hot bath in summer, and meanwhile the bather can be prevented from being exposed possibly; and the problem that the bathroom is poor in ventilation and extremely stuffy in summer since the window must be closed in order to prevent exposure is solved.

The invention discloses a novel large-table-board LED exposure machine. The machine comprises a tank, an adjustable handle device, batteries, connecting rods, moving wheels, a transmission motor, exposure lamps, a cooling fan device, a rain baffle device and a mounting plate, wherein the adjustable handle device is in shaft connection with the left side of the tank. Movement is more flexible due to the arrangement of the transmission motor and the moving wheels; a protective casing, fan blades, a rotating table, mounting bolts, fixing plates, a rotating rod and a rotating motor are arranged, so that the cooling effect of the exposure machine is improved; the fan blades are made of PVC plastic, accordingly, corrosion is prevented, and the service life is prolonged; the protective casing ismade of PE plastic, and maintenance cost and deadweight are reduced; carrying and moving are convenient as a result of arrangement of a handle, an extension pipe, an adjusting bolt, a rotating shaft and a fixing pipe; rainwater is prevented from entering the exposure machine to damage the exposure machine by the aid of a hinge, a connecting plate, a baffle, auxiliary tapes and main tapes.