Carl-zeiss-stiftung

Peter Greve

Martin Blumentritt

Gerhard J Muller

Gerhard Hohberg

Harald Sakowski

Karl Brenner

Reiner Kohler

Klaus Biber

Hartmut Gartner

Andreas Dorsel

Uwe Vry

Wolfgang Rupp

Berthold Schierle

The invention is directed to a frequency-doubling solid state laser having pump light sources at opposite ends thereof. A folding and out-coupling mirror is antireflection coated on both sides with respect to the wavelength of the light generated by the pump light sources. The pump light sources include a total of four laser diodes with each laser diode generating 3 Watts of light power. An output power at 532 nm is obtained using a Nd:YAG laser rod and a frequency-doubling crystal made of potassium titanyl phosphate. The folding angle defined by the folding and out-coupling mirror is in the range of 10.degree. to 60.degree. and is typically 50.degree..

Frequency-doubling solid state laser

The invention is directed to an arrangement for operating a laser diode. A two-stage stabilization circuit is provided for stabilizing the wavelength of a laser diode to exactly defined values for its use in distance measuring interferometers. In addition to presetting the operating parameters of current and temperature of the laser diode, the emitted wavelength of the laser diode is controlled to a predetermined transmission maximum of a Fabry-Perot interferometer. At switch-on, a control program can be called up and compute new values for the operating parameters premised on the last measured values of the operating parameters and initially determined and stored coefficients. In this way, the program always reliably sets the wavelength of the laser diode to the same transmission maximum.

Arrangement for operating a laser diode

The invention is directed to an ophthalmologic apparatus which includes a laser module which permits microsurgery with pulsed radiation as well as coagulation therapy by means of continuous-wave radiation.

Ophthalmologic apparatus

The invention is directed to a solid state laser wherein the pump sources are connected with holding parts and can be seated into a predetermined and reproducible position with mechanical guides and stops. In this way, an exchange of the pump sources is possible without a new adjustment or a readjustment.

Solid state laser

The invention is directed to a cooling arrangement for a semiconductor pump source which develops heat during operation. The cooling arrrangement includes a heat sink defining a seat for accommodating the pump source thereon and a cooling channel is formed in the heat sink for conducting a coolant therethrough to remove a major portion of the heat. A Peltier device is connected to the heat sink for finely controlling the temperature of the heat sink so as to permit the semiconductor pump source to emit radiation having a predetermined optional wavelength.

Cooling arrangement for a semiconductor pump source

The invention is directed to an electric plug connector having a cooled connector component on a consumer where an intense heat is generated. The plug connector includes a movable connector component having a flexible supply line and both connector components are configured with heat-contact surfaces which define a low heat resistance when in contact with each other. In the movable connector component, at least one electrical line part is connected to a part made of a good insulating and heat-conductive material. The flow of heat to the heat-contact surface of the movable connector component takes place through this part made of insulating and good heat-conductive material.

Electric plug connector

The invention is directed to a laser arrangement for converting frequency wherein the fundamental frequency or the converted frequency can be selectively emitted by means of an optical element which can be pivoted into and out of the beam path. An especially slim configuration of the overall arrangement is obtained with the aid of an additional deflection element.

Arrangement for converting the frequency of a laser beam

Device for therapeutical irradiation of organic tissue by laser radiation

The invention is directed to an arrangement for correcting the position of a laser beam guided by means of an articulated optical system. This system includes a position-sensitive detector at its output end for generating a signal which is passed to an adjustable mirror arranged on the input end. The adjustable mirror compensates for an excursion of the laser beam occurring as a result of faults in the guide means and bearings of the articulated arm. Prior to entering the articulated optical system, the laser beam or parallelly guided pilot beam is modulated with respect to the beam direction with a small amplitude by another adjustable mirror. The detector signal component corresponding to the modulation frequency is passed to an electronic circuit which determines the directional relationships between the excursion of the laser beam at the output of the articulated arm and the follow-up movement of the adjustable mirror for deflecting the beam. This determination is achieved independently of the amount of rotation of the rotational bearings.

Arrangement for correcting the position of a laser beam guided by means

The invention is directed to an arrangement for compensating for offset and angular errors of a laser coupled into a processing machine or measuring machine. The laser is mounted separately from the machine. The arrangement includes two adjustable mirrors by means of which the beam position at the coupling point is maintained constant. The corrective signal is generated by quadrant detectors cooperating with the adjustable mirrors arranged in the path of the laser beam. The detectors are arranged to receive rays of light diverted from the path of the laser beam. One of the detectors is preceded by a collimator causing the detector to respond only to angular errors.

Beam position control for a laser machine device

A manipulator is provided for a surgical microscope in order to deflect a laser beam on the viewed operating area, the movement of a handle being transmitted via a lever mechanism to the movement of a mirror which reflects the laser beam to a point and via a path within the viewed operating area. The sensitivity of transmitted motion can be adapted to the selected magnification of the surgical microscope by changing the length of a transmission lever in order to change its point of motion pick-off from the handle.

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Essingen, Germany

Peter Greve