DD275933A1 - OPTICAL BEAM DIVIDER - Google Patents

Abstract

Optical beam splitter for beam splitting in optical devices with non-parallel beam path, especially in microscopes with multiple Abbildungsstrahlengangausgaengen. By an optical beam plate, consisting of a splitter cube, which is provided according to the invention with spheric entrance and exit surfaces, no balancing optical elements need to be switched into the beam path when removing the splitter cube. Furthermore, a significant reflection and scattered light reduction occurs. The technical-oeconomic effort for such Strahlengaenge reduced. Fig. 3

Description

For this 1 page drawings

Field of application of the invention

The invention relates to an optical element for beam splitting in optical devices, in particular in microscopes with multiple imaging beam path output.

Characteristic of the known state of the art To divide a beam into two or more beams or to merge two or more Bundles of rays to form a bundle of rays, so-called beam splitters are used (H. Naumann / G. Schröder, Components of optics, 4th ed., Carl Hanser Verlag Munich, Vienna, 1983, pp 18β-188). In optical devices, especially in microscopes, splitting the imaging beam line into two simultaneously

used beam paths preferably used a splitter cube. For various reasons, it may be necessary that at times only one of the existing beam paths is used. For this purpose, the splitter cube from the

Picture beam taken out. When using splitter cubes in optical devices, especially microscopes with a non-parallel beam path

occurs the disadvantage that the part of a beam taken out Teilordwürfe! must be replaced by a balancing prism or a planparallole glass plate. This measure is necessary in order that the image (inter-image) plane located on the rear of the divider cube and also the image size are constant in the beam path concerned. b.'olberi.

A woiterer disadvantage is that by the dividing cube, the Ausgelichsprisma and the planparallolen glass plate

For glass-air surfaces perpendicular to the optical axis, reflections have a negative effect on the quality of the biases.

To reduce reflections, solutions such as anti-reflection of glass surfaces, skew and decentering are more visual Structural elements, blackening and light-absorbing design of cavities are known (H. Naumann / G. Schröder, Bauelemente

Optics, 4th ed., Carl Hanser Verlag Munich, Vienna, pp. 71-78 and Naumann, optics for designers. 3rd ed., W. Knapp Verlag

Dusseldorf, 1970, pp. 110-112). However, the application of these solutions requires further technical and economic expenses

in the manufacture, assembly and adjustment of these components.

Object of the invention

The Ziol of the invention consists in the provision of an optical beam splitter with the mentioned disadvantages of the known technical solutions significantly reduced or totally eliminated who the. In particular, the effort to reduce reflexion is.

Explanation of the essence of the invention

DIo object of the invention is the creation olnos optic Strahlonteiiers, the oin extremely low redox and Stroulichtverhalton has compared to bokannten optic Strahlentilorn relatively smaller dimensions and must not be replaced by compensating op.'sche device t at Takeout from a nlchtporaMelen beam path. The object is achieved by an optical beam splitter consisting of a splitter cube according to the invention by providing a partial cube efno convex entry surface and two concave exit surfaces, wherein the redia of the entry and exit surfaces are concentric.

According to the invention, the entrance surface and the exit surfaces are formed by the plano-voxlinso and plano-concave lenses, respectively. Woftorhin in that at least on oinor of three surfaces of Toilerwürfsls, which, however, not the entrance and the two! Exit surfaces are provided in the gostalt of a mirror, but not in the 90 ° umlaut, in a mirror

The inventively designed optical beam splitter is arranged in optical devices, especially in microscopes with Richtparallelem beam path in the imaging beam path that the common center of the radius of the convex Elntrittstiäche and the radius of the respective concave exit surface in the Teilurigäwürfel following first image (inter-image ·) plane the relevant beam path lie.

By applying the optical beam splitter according to the invention, the stated aim and the object is fully met.

Ausführungsbelsplele

The invention will be described in more detail below with reference to Ausführungsbeispiel. It zelyen in a schematic representation

Flg. 1 shows an optical beam splitter according to the invention,

Fig. 2 shows a weitero embodiment dos optical beam splitter and

Fig. 3 shows the arrangement of the optical beam splitter in a microscope tube.

1 shows an optical beam splitter consisting of a splitter cube T which, according to the invention, has a convex entrance surface E and two concave exit surfaces at A1, A2, wherein the rotations of the surfaces E, A1, A2 are concentric. The Eiritrittstläche c and the Ausfuttsflächen Al, A2 are preferably arranged by Plankonvexlir.se LE. On the corresponding surfaces of the splitter cube t. or plan concave lenses I formed. But they can also be part of the prismatic body of the divider cube T.

A ray bundle passing through an imaging beam path AS is divided by the sub-cube T and, by means of a design according to the invention, each sub-beam in the relevant beam path is imaged into the image plane 01:02 following the splitter cube T.

Fig. 2 shows another embodiment of the optical beam splitter. At least one of three surfaces of the divider cube T, but not the entrance surfaces and the two outlet surfaces, preferably in the area T1, is a lobe momentum, for example a 90 'umlonkeloment, in gesial; a mirror S arranged.

FIG. 3 shows the arrangement of the d6S optical beam splitter * in a microacoustic tube known from the prior art. To divide the Abbiidungsstrohlenganges AS in a Beobar.htungsstrahlengang BS i.nd a Fcxostrahlengarig FS an inventively designed Teilur <dice T is arranged behind a Tubuslinso 1 in Abbildungsstrahlangang AS, wherein the common center of the radius of konvoxon entrance pool E and the radius you respective concave vtn exit surface A1, A2 in the BiId- (intermediate image ·) Ebern »0Ί or 02 is located. As a precaution, the divider cube T is displaceable. In the observation beam path BS and in the photo beam path FS, a field lens 2 is arranged in front of the image (intermediate image) planes 01 and 02 for the purpose of adjusting the pupil.

Denoted by 011 and 021 is an image (intermediate image) plane in an eyepiece, not shown, or in a photographic camera, not shown.

Is the splitter cube T In de r. When the imaging beam path AS is turned on, the image of an objective formed by a microscope (not shown) is simultaneously present at the image (interframe) planes 011 and 021. To image an image in only one of the two beam paths BS, FS, the splitter cube T is configured from the imaging beam path AS. Due to the inventive design of. Tellerwürfels T need instead of this no Aucglekhselement be turned on, so that the image in the image (Zwischenbild-) ebeao 01 or 02 is located.

For imaging the image only in the photo beam path FS, a mirror 3 is switched on in the imaging beam path AS. It may, as shown hler, a separately bowegbarer mirror, or be described in Figure 2 Ausführungslorm or another known solution.

Claims (3)

1. Optical beam splitter, consisting of a splitter cube, characterized in that at a Teilerwürfe! (T) a convex entry surface (E) and two concave exit surfaces (A 1, A2) are provided, wherein the radii of the surfaces (E, A1, A2) are concentric. 2. Optical beam splitter according to claim 1, characterized in that the entry surface (E) and the exit surfaces (A 1, A2) by arranged on the corresponding surfaces of the splitter cube (T) Plankonvexlinse (LE) or Plankonkavlinse (L) are formed. 3. Optical beam splitter according to claim 1 or 2, characterized in that at least on one surface (T 1) of the splitter cube (T) a deflecting element, preferably a 90 ° deflecting element in the form of a mirror (S) is provided.