Las Laser Analytical Systems, Gmbh

Francotyp-postalia Ag & Co.

Ralf M&uuml;ller

Wolfgang Gries

Eckhard Zanger

Wolfgang Muhl

Wolfgang Von Inten

A method for the production of Gaussian intensity distribution in the beam profile of secondary radiation generated by non-linear optical processes, particularly frequency conversion and more particularly frequency doubling of a primary radiation beam. The non-linearly generated, secondary radiation beam is non-Gaussian in profile due to the walk-off effect and has a near field path near the non-linear optical material and a transition field path interconnecting the near field path with a remote, or far, field path. A Gaussian secondary beam profile of substantially circular cross-section is produced at a finite distance from the optical material by providing an optical system in the transition path which, taken as a whole, has no divergence altering or imaging effect on the secondary radiation beam.

Method for the production of Gaussian intensity distributions in the beam profile of radiation generated by non-linear optical processes

The invention pertains to a method and to a device for resonance enhancement, in particular for tunable frequency conversion of continuous laser radiation, in particular, with a resonator of mirrors and at least one refractive element. The purpose of the invention is to develop a method and a device of the described type, so that the frequency conversion of continuous laser radiation, in particular, will occur at high efficiency while avoiding the described disadvantages, and so that an improved tunability will be assured over the greatest possible wavelength range with regard to the incident wavelengths; this problem is solved in that a tuning of resonator length is performed by translation of at least one refractive element P. The resonator is formed from a first mirror M,a second mirror M,and of a refractive element P designed in trapezoidal shape, which performs the function of a prism.

Method and device for resonance enhancement, in particular for tunable frequency conversion of laser radiation

A device for positioning an ink jet print head and a cleaning and sealing device may be used in a postage meter and/or addressing machine for print media guided along a printing window in a guide plate by a transport device. In order to improve printing quality, the print head stationarily disposed behind the guide plate and the printing window is adjustable out of a printing position to be set in a defined way, into a cleaning and/or a sealing position and back again, and a cleaning and sealing device adapted to the print head can be coupled to the print head in a positionally accurate and functionally appropriate manner. The print head is pivotably secured and the cleaning and sealing device is disposed behind the guide plate, but linearly adjustably toward and away from the print head. A common gear for adjustment of the print head and the cleaning and sealing device is driven by a motor running in only one direction of rotation. The print head, the cleaning and sealing device, the gear and the motor are combined into a compact structural group secured adjustably to the transport device.

Growing community of inventors

Berlin, Germany

Ralf Müller

Growing community of inventors

Berlin, Germany

Ralf M&uuml;ller

Ralf Müller