摘要:
An applicator for treatment of an elevated internal ocular pressure by means of laser radiation has a handpiece, which releasably surrounds a fiber optic light guide on its exit side end. A sleeve portion is releasably connected to the exit side end of the light guide, a condensing optical element being provided in the sleeve portion, optically dimensioned and arranged in the sleeve portion at a distance from the exit side end of the light guide such that the applied laser radiation can be focused in the ciliary body of the eye on contact of the sleeve portion with the surface of the eye.
摘要:
The present invention relates to a device for blinding the administration of nonsolid pharmaceutical presentations. The device is in particular an opaque container which has at least two attachments, one of which is intended for connection to a dispenser for the pharmaceutical presentation, and the other of which is intended for connection to an applicator, the inside of said container having means for holding back the pharmaceutical presentation.
摘要:
Phase-contrasting elements are arranged in the viewing beam paths of a stereomicroscope to make transparent media visible with rich contrast such as in the area of ophthalmologic surgery. The phase-contrasting elements make the transparent media visible as phase objects in the amplitude contrast. The phase-contrasting elements are selected in dependence upon the light source diaphragm which is used.
摘要:
The invention relates to a zoom system for imaging, with a variable scale of imaging, a fixed entrance plane (16) onto a likewise fixed target plane (15). The zoom system includes a proximal partial system (T.sub.1) with variable converging power and a distal partial system with fixed converging power. The proximal partial system itself includes a distal component (10) and a proximal component (8), which respectively have a positive converging power. The converging power of the proximal component (8) is substantially greater than the converging power of the distal component (10). The proximal partial system (T.sub.1) acts as a collimator. The rear focal plane is virtual. Between the proximal component (8) and the distal component (10), two components (9a, 9b) with negative converging power are displaceable along the optical axis for varying the magnification. These displaceable components (9a, 9b) have a high converging power, so that a large variation of the imaging scale between 1.times. and 20.times. can be attained with short displacement paths. The zoom system preferably serves for focusing a therapy laser beam in a laser slit lamp. Due to the high converging powers in the proximal portion of the zoom system, the laser beam is greatly widened, and the beam waist is located behind the target plane (15), by which means high intensities in the front region of the eye are avoided.
摘要:
A corrosion inhibiting primer for metal pieces which need not be removed prior to welding the pieces includes an alkali metal silicate binder having a silicone wetting agent incorporated therewith, a powder metal and an oxygen scavenger. The primer can be sprayed onto the metal. Zero porosity welds can be achieved up to speeds of about 750 mms/sec. by welding through the primer.
摘要:
Two partial annular rigid clamp sections pivotally attached to spaced pivot pins on a base pivot open to receive an item and pivot closed automatically due to the pressure of the item on bottom ends of the clamps. Mating teeth interlock on the upper ends of the clamps with the ends overlapping to encircle an item, such as a pipe, tool, hose, or other item to be secured to a structure and automatically lock it within the clamp.
摘要:
A process is described for false twist texturing polyester filament yarn at greatly enhanced speeds while inserting comparable twist levels and obtaining comparable yarn bulk without increasing yarn heat setting lengths. The process is particularly adopted to the utilization of partially oriented yarns in a draw texturing operation utilizing friction twisting as the means for simultaneously drawing and heat setting the yarn in a twisted state.