DE2236261A1 - LENS CONTAINING A FILLING FRAME AND AT LEAST TWO OPTICAL LINKS - Google Patents

Description

JENOPTiKJESiA GmbH

The

Lens containing a filling mount and at least two optical links

The invention relates to an objective in which at least two optical members are arranged in a filling socket.

The previously known Püllfassungen have a cylindrical Inner surface, 'at one end of which there is an annular contact surface is located. The first filling link directly adjacent there has the smallest and the last one the largest tilting error. With many links In the worst case, these tilting errors add up to such an extent that the number of links increases Such lenses are completely unsuitable for high optical requirements.

However, in order to keep these errors within tolerable limits, the individual optical elements must through mutual Twisting to be aligned with each other, which is a very tedious one Work means and nevertheless in most cases does not lead to a satisfactory result. Another disadvantage Such lenses consists in the fact that after dismantling the lens, this complex adjustment work must be repeated must become.

The purpose of the invention is to eliminate the deficiencies inherent in these fillings.

The invention is based on the object of creating lenses constructed according to the principle of the filler fitting, in which the The advantage of the filling mounts lies in the simple assembly

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used and the disadvantages of the same largely avoided will. A particularly important part of the task is the requirement for a lens, its individual links to each other, so without summing their errors are opticch centered as exactly as possible and thus this lens at the highest demands on image quality can be used.

According to the invention, this object is achieved in the case of an objective which contains a filler mount and at least two elements, solved in that the axial alignment of these individually held in rings with plane-parallel Ctirnflachen members by an annular contact plane provided in the mount and at right angles to the optical axis, using axial Directed forces takes place in such a way that the one link with the outer annular region of the one end face its mounting ring is supported against the contact plane and the other member with the one facing the first-mentioned member The end face of its mounting ring is supported against the free annular inner area of the first-mentioned mounting ring and in the case of more than two links, at least one of these further links set in rings using the same axially acting pressure elements and at least one further annular contact surface of the filling mount in relation to the rest Limbs are held in defined positions and when screwing ^ or resilient elements for generating axially directed forces are provided.

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In the case of more than two-part lenses, it is advantageous to when the end faces of the rings of the first-mentioned members facing these additional members are used as contact surfaces serve and to secure these links in position, screw rings and / or resilient elements are provided.

To avoid cumulative errors in multi-unit lenses, it is also very advantageous if individual successive links in rings with equiaxed cylindrical attachments of different diam.sser and different Lengths are taken, these cylindrical lugs are nested like a box and with the associated Links facing away from the end faces of the cylindrical lugs by means of springs directly or with the interposition of a further plane-parallel ring are pressed against a common contact plane in the lens housing and the mutual The distances between the individual links in relation to the system level are determined by the respective cylinder lengths.

If at least three links arranged one inside the other in a box are used, then those between them must lying resilient elements be graded in their compressive forces so that all links in the direction of the common contact plane to be printed.

An advantageous embodiment results when a plane-parallel ring is located on the contact plane located in the mount is stored, which can itself be the carrier of an optical member and which is a tilt error-free system in both directions at least one each held in a plane-parallel ring

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Member allows.

If the lens is to be equipped with a diaphragm or a shutter, this is a favorable solution, when the plane-parallel ring comprises the aperture or the shutter, with the plane-parallel ring and the lens housing Actuating means are to be passed through.

A technologically favorable execution form results, if the contact plane is different by two fitting parts arranged one inside the other and held together by a screw ring Long is formed, wherein the inner mount part can be the carrier of at least one further optical member.

In the case of lenses with a very large number of elements, it is necessary that at least two contact surfaces are used in the mount find and these contact surfaces assigned by elastic Rings of the optical elements, one behind the other or in a box-like manner, are pressed in the direction of these surfaces by pressing elements are arranged.

Embodiments of the subject matter of the invention are shown in simplified form in the drawing demonstrate:

Fig. 1 a two-part system, Fig. 2 a three-part system, FIG. 3 shows a four-part system, FIG. 4 shows a six-part system FIG. 5 shows a seven-part system. FIG. 6 shows a three-part system with a diaphragm and

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Fig. 7 shows a three-part system in which the housing

has an inner cylindrical surface without a shoulder.

For the sake of clarity, the many peripheral edges have been omitted in all figures. The same applies to the numbering, sbh in the Parts repeating individual figures are omitted insofar as they are not specifically mentioned in the part of the description associated with the respective figure. One for the Vexsländnis Invention very important detail is the contact surface 1 ', the is shown exactly one above the other for better understanding in the individual figures.

In the lens mount 1, according to FIG. 1, there is an annular contact plane 1 ', arranged at right angles to the optical axis of the lens. whose area size is determined by two inner cylinder areas of different diameters centered on one another. The position of the two optical members 4 and 5, which are held very precisely in rings 2 and 3, is determined by this contact plane. This is done in that the plane-parallel to the optical axis of the member 5 centered ring 3 is pressed ^{by means of a screw ring 6 with the annular area 3 1 of} its end face against the contact plane 1 ^1. The ring 2 carrying the link 4 is pressed against the remaining area 3 "of this ring from the opposite side of the lens mount by means of a screw ring 7, so that the ring 2 over the surfaces 2 >>3"; 3 »is aligned as precisely with the system level 1 * as if it had been directly connected to this system level 1 * without intermediate links,

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That in Pig. The objective shown in FIG. 2 shows one of FIG. 1 very similar lens, which however has been expanded to include the optical element. This is also set in a ring 9 and member centered therein is by means of a compression spring 10 arranged between this ring and the ring 2 against a to the system level 1 · aligned further system level 1 "pressed and thus in a defined position in relation to the other optical links held. The firm pressing of the ring 2 against the ring 3 is in contrast to the Pig. 1 not achieved by a screw ring, but taken over by the compression spring, thus saving a second screw-on ring. The assembly of the lens according to Pig. 2 takes place only from the side of the screw ring 6.

In Pig. 3 shows an exemplary embodiment in which one on each side of the basic system shown in FIG another optical element 11; 12 is arranged. Securing the position of the four links 4; 5; 11 and 12 in the Version 1 takes place in Fig. 3 by means of two screw rings 6 and 7 and the compression spring 13 # between the screw ring 7 and the ring 14 of the link 11, i.e. on the side of the smaller cylinder diameter of the fit 1 is arranged.

It is also conceivable, instead of the screw ring of Fig. to provide the fit 1 with one of the Fig. 2, 1 ″ correspondingly shaped contact surface and the compression spring 13 and the four links 4 set in rings; 5; 11 and 12 to be inserted from the side of the larger fitting diameter and

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Overcoming the force of the spring 13 'to tighten the screw ring 6 until the ring of the link 5 is firmly attached to the contact plane 1'.

Of the four members of this filling socket, the two inner members 4 and 5 are very precise and the two outer ones Links 11 and 12 due to the never to be avoided even the smallest manufacturing tolerances with corresponding however just from ever. two errors of cumulative inaccuracy centered. The decisive factor for this version is that the sum error here results from only two variables, while with . the previously customary fillings - assuming the same manufacturing tolerances - the cumulative error in the present case results in four sizes and is therefore significantly larger.

FIG. 4 shows an embodiment which is particularly suitable for multi-link lenses is provided. Here, too, as in all cases of the invention, the individual optical elements are in rings centered on these (cylinder with plane-parallel End faces). In this exemplary embodiment, the contact plane 1 'in the mount 1 is replaced by an optical Ring 16 carrying member 15 with a plane-parallel flange-like Increased paragraph of defined thickness, so that against this, an enlarged end face 16 'carrying ring four further rings 17, each carrying an optical member; 18; 19; can support, of which the rings -18 · 19 and 20 are equiaxed cylindrical lugs 18 ·; 19 '; 20 'different Diameters and different lengths and box, are arranged like one inside the other, the lengths of the cylindrical

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see approaches are dimensioned so that the distances between the individual members and in relation to the plant level 1 'are precisely determined by them. Between these, the four members supporting rings 17; 18; 19; 20 are three compression springs 21; 22; 23 arranged, whose different compressive forces act so that these members come to rest on the end face 16 ^{f of} the ring 16 with the pressure required for the stability of the lens. This lens is held together only by the screw ring 6. It can be clearly seen that here, too, the residual errors of the individual links cannot add up to an intolerable overall error.

FIG. 5 shows an example very similar to FIGS. 1 to 4 in the case of the one centered on one another using three Investment levels 1 ·; 1 "; V" seven optical elements according to the principles described above without adding up all of the individual elements Residual errors are centered very precisely. The inserted intermediate ring 24 could with slightly different dimensions of the neighboring Diameter, in particular the parts 17 and 18 are also omitted. This figure is also intended to be the transition to the embodiment according to FIG. 6 show v / o the corresponding plane-parallel ring 25 dimensioned somewhat larger, at the same time as Support body of a diaphragm device 26 or a closure device is formed, the actuating means in not are passed through the mount 1 of the lens in the manner shown. The rest of the structure of the two in FIG. 5

ο
and 6 lens shown does not differ in principle

of the lenses shown in the other figures.

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It is entirely possible to use those shown in FIGS Lenses also according to FIG. 4 with those arranged like a box To provide links in order to increase their number of links and without adding up their residual errors.

In Fig. 7, a type of lens is shown in which, while maintaining the principles described above, the lens mount very simple with an uninterrupted, continuous inner cylinder surface is executed. How the three optical links, also centered in rings, are stored and secured in it can be found in this figure without further explanation.

In this case, the contact surface 1 ^f is formed by a cylindrical mount part 29 which is fastened to or in the lens mount 27 by a screw ring 28. The frame part. 29 serves at the same time as a support for an optical element 30. The rest of the structure of this version corresponds to that of FIG. 2. It is important that the individual elements are also precisely centered in relation to their rings and that all end faces are plane-parallel. "In this example, too, it is possible to increase the number of links in accordance with the previous examples without sacrificing accuracy,.

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Claims (9)

1 J lens containing a flush mount and at least two optical members, characterized in that the axial alignment of these individually in rings (2; 3; Fig. 1) with plane-parallel end faces mounted members (4; 5) by a in the fit (1) provided annular contact plane (1 *) lying at right angles to the optical axis using axially directed forces in such a way that one link (5) with the outer annular area (3 ¹ ) of one end face of its fitting ring (3) is against the contact plane (1 ^f ) and the other link (4) with the end face (2 ^f ) of its fitting ring (2) facing the first-mentioned link (5) is supported against the free annular inner area (3 ") of the first-mentioned fitting ring (3) and in the case of more than two links, at least one of these further links (8) enclosed in rings (9; Pig. 2) using also axially acting pressure elements do) and at least one further annular contact surface e (1 "; Pig. 2) the flush mount in positions defined in relation to the other links (4; 5; Pig. 2). 2. Objective according to claim 1, characterized in that screw connections (6; 7; Pig. 1) or resilient elements (10; Pig. 2; 13; Pig. 3) are provided for generating axially directed forces. 3. Lens according to claim 2, characterized in that for the more than two members (11; 12; Pig. 3) these 2729 G 3412 309824/0744 Links each facing end faces of the rings (2; 3) of the first-mentioned links serve as all contact surfaces and to secure the position these links screw rings (6; 7) and / or resilient elements (13) are provided. 4. Lens according to claim 3 »characterized in that, in particular with multi-unit lenses, individual members in rings (18; 19; 20; Pig. 4) with equiaxed cylindrical lugs (I8 ^f ; 19 ';20') of different diameters and different lengths are, these cylindrical lugs are arranged one inside the other like a box and with the end faces of the cylindrical ^{lugs (18 1} ; 19 '; 20 ^f ) facing away from the associated links by means of springs (22; 23) directly or with the interposition of a further plane-parallel ring (16; Pig »'4;24; Pig. 5) are printed against a common contact plane (1') in the lens housing (1) and the mutual distances between the individual members (17; 18; 19; 20) in relation to the contact plane by the respective cylinder lengths are determined. 5. Lens according to claim 4, characterized in that at least three are arranged in a box-like manner one inside the other Mounts of the optical members between these members resilient elements (21; 22; 23) graduated in their compressive forces are arranged. 6. Lens according to claim 1 to 5, characterized in that ^{a plane-parallel ring (24) is mounted on the contact plane (1 f} ; Fig. 5), which enables a tilt error-free contact in both directions at least one member held in a plane-parallel ring . \> '■ 2729 30 9 824 / 07U G 3412 ' 7. Lens according to claim 6, characterized in that the plane-parallel * ring (24; Pig. 5) at the same time Is a carrier of a further optical element or comprises a diaphragm (26; Fig. 6) or a shutter. 8. Lens according to claim 1, 6 and 7, characterized in that the contact plane (1 ¹ ; Fig. 7) is formed by two nested and by a screw ring (28) held together mount part (27; 29) of different lengths, wherein the inner mount part (29) which can be the carrier of at least one further optical element (30). 9. Lens according to claim 1 to 7, characterized in that in multi-link lenses at least two contact surfaces (1 ¹ ; 1 ";1"»; Fig. 5) in the mount (1) are used and these contact surfaces associated with elastic Rings of the optical elements that are pressed in the direction of these surfaces are arranged one behind the other or in a box-like manner within one another, Slη / Pi r / 2729 G 3412 30982 W07U