TW201435422A - Thermally compensated optical assembly having an optical component retained in a form-locked manner - Google Patents

Abstract

The invention relates to a thermally compensated optical assembly having an optical component (1) that is retained in a holder (4) in a form-locked manner within an application temperature range. The holder (4) comprises a holder ring (2) having a first ring bezel (2.1) formed thereon or fastened thereto and at least three ring bezel segments (3.1-3.3), which are rigidly connected to the holder ring and together form a second ring bezel. The first ring bezel (2.1) and the ring bezel segments (3.1- 3.3) lie on opposite optically active surfaces of the optical component (1) in such a way that contact paths are formed. By selecting suitable materials for the holder ring (2), the first ring bezel (2.1), the ring bezel segments (3.1-3.3), and the optical component (1) and selecting radial length dimensions (l1- l4) with respect to the axis of symmetry (0) of the holder ring (2) in coordination with the selection of materials, the expansion differences of the optical component (1) and the holder (4) are cancelled out along the contact paths within a specified temperature range.

Description

Optical construction group having an optical component that is held in a form-fitting manner to compensate for thermal effects

The present invention relates to an optical construction set that compensates for thermal effects, having a support and an optical member, particularly a lens, retained in the support by shape fitting, the optical construction set and the patent US 4 850 674 The optical construction group disclosed in A is of the same type.

The construction of the support of the optical component depends in principle on the quality of the optical system to which the optical component belongs and its associated transport conditions, storage conditions and conditions of use. Among them, especially the expected impact load, temperature fluctuations during transportation, storage and use, as well as energy radiation and spectral radiation during use will have an impact.

Due to the requirements set forth for the construction set of the present invention, only the following construction groups or supports are considered as an integral part of such a construction group in the prior art: it is used for an optical member in the same manner as the construction group of the present invention. The non-material joining method is maintained in a seat, and the optical member and the holder are compensated for expansion therein.

The present invention is based on a specific subject. There is a need to develop a calibratable mount that is suitable for an operating temperature range of +/- 5 ° C and is suitable for extended temperature ranges of +/- 40 ° C during storage and transport, in particular -20 ° C to + 60 ° C. For technical reasons, the housing of the object should consist of aluminum. In this operating temperature range, in the case where the glass of the lens has an expansion coefficient of 0.5*10 ^-6 /K and a clear aperture of 120 mm, the lens is composed of aluminum having an expansion coefficient of 23*10 ^-6 /K. A difference in expansion of +/- 14 μm is produced between the housings over this diameter. The resulting difference in expansion does not allow for irreversible misalignment or damage of the lens during transport and storage, and the lens must remain unstressed even in the case of poor expansion within a certain tolerance during use. Heart position. In this operating temperature range, it is necessary to maintain the centering of the optical member with an accuracy of better than 1 μm. After reaching any temperature within the extended temperature range, after the structural group reaches a temperature within the operating temperature range, the initial The position should be readjusted to an accuracy better than 1 μm.

In addition, the construction set should withstand an impact load of at least 20 g without causing permanent movement of the optical member greater than 1 μm. The natural frequency of the constructed set should be greater than 450 Hz.

The patent document DE 10 2006 060 088 A1 discloses an optical construction group using a rotationally symmetrical support scheme in which an optical element or an optical element held in a support is held by three tangentially abutting elastic elements. The optical element is held in low stress by the elastic compliance of the tangentially engaged elastic members and compensates for the different thermal expansion of the optical element or the holder and the housing. The optical components in this case are always centered.

The disadvantage of this case is that the optical components cannot be calibrated in the holder, especially in lateral alignment. Such a mount is not suitable for applications where no stress or stress variations are allowed in the optically active area of the lens because the lens is held in compression fit, and the force of the engagement of these snaps is pulled. Or the form of pressure passes through the optically active area. Thus, for example, when the temperature changes, these directions of action produce alternating stresses in the optically active regions of the optical component. When the tangential retaining element is engaged with the support, the retaining force is absorbed by the support. In the case of the application of the support, the aforementioned patent specification DE 10 2006 060 088 A1 does not teach how the optical element is held on the support without stress or low stress. Especially in the case of temperature changes, optical components and supports How the different degrees of expansion of the seat are compensated.

A holder of a similar action is disclosed in the patent document US Pat. No. 6,239,924. However, unlike the above solution, the tangentially engaged retaining member in this case is a discrete leaf spring.

The patent application DE 10 2006 038 634 A1 relates to a holder for an optical element, characterized in that the holder distributes the holding force required to hold the optical element to at least four circumferentially mounted radial cards. Combined holding element. In this case, the holding force is distributed to the holding elements as uniformly as possible by connecting adjacent holding elements. In this way, in particular the manufacturing tolerances in the statically indeterminate system can be compensated. This type of support is also suitable for compensating for differences in expansion between the optical element and the support by deforming the retaining element.

However, such a support cannot be radially calibrated. In addition, different thermal expansions are compensated for by the deformation of the retaining elements in the radial direction. Although evenly distributed in the circumferential direction, these connecting elements react with a variable restoring force. In particular, the resulting radial force applied to the optical element is directed by the optically active area of the element and creates a variable stress in the optical element, thereby causing stress birefringence.

The patent document DE 100 42 844 C1 discloses a lens holder which likewise has at least four circumferentially arranged holding elements. These retaining elements are embodied as radially elastic pretensioned leaf springs. The axial stiffness of these retaining elements is extremely high. That is, the optical element is held axially in a position that it is held centrally by the balance of the radial restoring force of the holding element. The difference in expansion is compensated by maintaining the radial compliance of the element.

Calibrability is achieved by radially engaging calibration components. These calibration components must be pretensioned by the retaining elements. The difference in expansion appears as a variable force that is guided by the optically effective volume. In principle, only a minimum radial holding force is required, which is also guided by the optical effective volume. lead. This will produce stress birefringence. The variable radial retention of the retaining element during calibration can cause variable stresses in the optically effective volume.

Common to all of the aforementioned prior art solutions is that variable thermal stresses are generated in the optical element when different thermal expansions occur, resulting in stress birefringence. These solutions are also not calibrated. Therefore, such solutions are not suitable for extremely low stresses over a relatively large operating temperature range (eg, δ T = 10 ° C) and over a much larger transport temperature range (eg, δ T = 80 ° C) The way the optical components are held.

The patent application US 2006/0066963 A1 relates to a low-stress, dynamic self-centering support device for an optical component, wherein a support member that maintains the dynamics of the optical component for easy measurement is substantially V-shaped on the optical component. The shape of the groove and the support are used to compensate for the difference in expansion. Such an embodiment is suitable for compensating for temperature differences but is also not calibrated. At the same time, such an embodiment occupies a large space, and the contour processing of the optical component is complicated and expensive. The contact surface with the holding member is extremely small, and a large local contact pressure per unit area is formed in the optical material, which in particular has adverse effects on the crystal material (such as CaF2) and greatly reduces the holding force.

The closest finding to the present invention is the patent document US 4 850 674 A. The case compensates for the difference in expansion between the optical lens and the support by specifically selecting the thermal expansion coefficient of the lens and the thermal expansion coefficient of the components constituting the support and the lengths associated with the thermal expansion arranged in the radial direction. Thereby the expansion difference is radially compensated to zero. That is, unlike all of the aforementioned prior art solutions, the lens is not held in a press fit in principle, but is held in a form-fitting manner, so that within the optical element, temperature changes do not cause any stress changes. The component constituting the support refers to a seat ring, and one end thereof is constructed with a facing end To the collar, an optically effective face of the lens abuts the collar. The other end of the seat ring has a retaining ring screwed in, the material of which is the same as the material of the seat ring. The retaining ring is divided into a plurality of radially curved supports by a plurality of slits, and the support members are surrounded by a plurality of radially extending supports. The retaining ring abuts against another optically active face of the lens or against a phase constructed therein that is made of a material having a coefficient of expansion similar to that of the lens. In this way, the optical axis of the lens can be held in its centered position relative to the support members, which is here necessarily equivalent to the axis of symmetry of the lens. This construction principle does not allow the other axis of the lens to be centered differently from the axis of symmetry. And the optics cannot be calibrated.

It is an object of the present invention to provide another solution for an optical construction set that compensates for thermal effects of an optical member held in a form-fitting manner, which solution has a larger construction space. Preferably, the optical member is laterally calibrated in a plane perpendicular to the optical axis.

The solution for achieving the above object of the present invention is an optical construction group for compensating for thermal effects, comprising an optical member having a first expansion coefficient which is held in a seat by shape fitting in an operating temperature range. .

The holder includes a seat ring having an axis of symmetry and including a first annular blade, and at least three annular blade segments fixedly coupled to the first annular blade, the annular blade segments collectively forming a first Two ring blades.

The first annular edge abuts the oppositely disposed optically effective faces of the optical member in a manner that forms a contact track with the annular edge segments that collectively form the second annular blade.

The seat ring has a second expansion coefficient, and the annular blade segments have a third expansion coefficient, wherein the first expansion coefficient is smaller than the second expansion coefficient, and the second expansion coefficient is small In the third expansion coefficient.

The abutment ring and the annular blade segments have radial length units relative to the axis of symmetry, the radial length units being sized according to the size of the optical member and the coefficients of expansion such that the optical member The difference in expansion from the support is offset on the contact trajectories.

The optical construction set also has a housing component and three retaining elements that connect the housing component to the mount.

Preferably, a phase is provided in the region of the first annular blade and the annular blade segments that abut the optical member.

The first annular blade is preferably also embodied as a plurality of annular edge segments. Preferably, the annular blade segments are constructed on the abutment ring so as to have the second expansion coefficient.

It is advantageous for the first annular blade to be embodied as a plurality of annular edge segments. In this case, the number and embodiment of the annular blade segments are preferably identical to the annular blade segments of the second annular blade and have the third coefficient of expansion.

The retaining elements are preferably arranged in a manner tangential to the support.

The center of the holding member is respectively connected to the support through a seat-side joint, and has a housing-side joint at each end, and the shell-side joints are respectively fixed to an adjusting unit. The adjustment unit can be moved radially in the housing member via an adjustment member.

According to a preferred embodiment, the optical component is made of quartz glass, the abutment ring is made of nickel steel, and the annular blade segments are made of aluminum.

Preferably, the holding elements, the adjusting units and the housing member are monolithic Embodiments wherein the joints are solid hinge devices.

0‧‧‧Axis axis

1‧‧‧Optical components, such as lenses

2‧‧‧Support ring

2.1‧‧‧First ring blade

2.2‧‧‧Act

3.1-3.3‧‧‧ring blade section

4‧‧‧Support

5‧‧‧Shell parts

6.1-6.3‧‧‧Retaining components

7.1-7.3‧‧‧Shell side joints

8.1-8.3‧‧‧Support side joints

9.1-9.3‧‧‧Adjustment unit

10.1-10.3‧‧‧Regulatory components

α ₁ ‧‧‧first expansion coefficient = expansion coefficient of the lens

α ₂ ‧‧‧second expansion coefficient = expansion coefficient of the bearing ring

α ₃ ‧‧‧ Third expansion coefficient = expansion coefficient of the annular blade section 3.1-3.3

l ₁ ‧‧‧first radial length unit

l ₂ ‧‧‧second radial length unit

l ₃ ‧‧‧ third radial length unit

l ₄ ‧‧‧fourth radial length unit

R‧‧‧ lens radius

1 is a side cross-sectional view of a holder having a lens in a first embodiment; FIG. 2 is a side cross-sectional view of a holder having a lens in a third embodiment; and FIG. 3a is a configuration in which the holding member adopts the first embodiment. 3b is a structural group in which the holding member adopts the second embodiment; and FIG. 4 is a plan view of the structural group.

The invention will now be described in detail by way of examples and the accompanying drawings.

The optical construction group of the invention which compensates for the thermal influence consists essentially of the support 4, the housing part 5 and at least three retaining elements 6.1-6.3 which connect the support 4 to the housing part 5, in which the support The optical member 1 having an optical axis is held in a shape-fitting and gap-free manner for at least an operating temperature range for compensating for the difference in expansion between the holder 4 and the housing member 5.

The optical member 1 herein may refer to any member that can be integrated into the optical path of an optical device in a manner that is integrated into the optical construction set and that affects beam steering or beam formation. The optical member has two optically active faces relative to the optical device: an entrance face and an exit face. The optically active faces each have a free area which, when referred to as an optical lens, is referred to as a free diameter. Carrying the optical member 1 in such a manner as to compensate for the thermal influence means holding the optical member 1 in its position within a temperature range. The optical member 1 also expands, so precisely only a selected point is held in its position relative to the optically active faces. When a lens is involved, the selected point is The apex through which the optical axis of the lens passes. It is not in any case and in all optical components 1 that the geometric midpoint of the optically active surface should be held in its position, but that other selected points of the following situation should be maintained in their position: the connection of the selected points The line is considered as the optical axis.

With the construction set of the present invention, the optical axis of the selected point that is eccentrically disposed on the optically active surfaces can also be held in place.

The abutment 4 consists essentially of a first annular blade 2.1 and a second annular blade which are connected by abutment ring 2 having an axis of symmetry 0, wherein the second annular blade is made up of at least three annular blade segments 3.1- 3.3 Composition.

Figure 1 shows a first embodiment of a support 4. Here, an optical lens used as the optical member 1 is carried so that the optical axis held at its position coincides with the axis of symmetry 0. The unit of the support 4 and the lens compensates for the thermal influence such that the lens is held in a form-fitting and pressure-free manner over an operating temperature range of, for example, 10 °C.

The lens abuts the first annular blade 2.1 in a region other than the free diameter with one of its two optically effective faces such that it is centered with respect to the first annular blade 2.1. The second annular blade abuts the oppositely disposed optically effective faces of the lens outside of the free diameter. To reliably prevent any retention forces from being transmitted to the optically active faces of the lens, a phase for the annular blade 2.1 to abut may be provided on both sides of the free diameter (not shown here).

The first annular blade 2.1 is formed on the closed ring body 2.2, which together form a seat ring 2 having an L-shaped cross section, wherein at the free end of the short side of the L-shaped body, the first annular blade 2.1 The edge faces the axis of symmetry 0 of the abutment ring 2. In this case, the edge of the first annular blade 2.1 is located on a circumference of the fourth radial length unit l ₄ having a radius about the axis of symmetry 0 of the abutment ring 2.

The second annular edge is formed by at least three annular edge sections 3.1-3.3. An annular blade section of the annular edge portion having a thickness of 3.1-3.3 third radial length unit l _3.

The annular blade sections 3.1-3.3 are connected at their substantially circumferential distances at at least substantially equal angular distances, and are fixedly connected to the ring body on the inner circumferential surface of the ring body 2.2. The inner radius of the inner peripheral surface is a second radial length unit l ₂ . The above connection may be, for example, a spiral connection. 3.1-3.3 edge of the annular blade section is positioned around the symmetry axis 0 is the radius of the first radial circumferential line unit of length l _1.

According to a second embodiment, not shown, the first annular blade 2.1 and the second annular blade in the form of an annular blade section 3.1-3.3 use the same embodiment. The annular blade segments constituting the first annular blade 2.1 are constructed on the closed ring body 2.2 to have the same material as the closed ring body 2.2. According to a third embodiment shown in Fig. 2, the annular blade segments constituting the first annular blade 2.1 can also be connected to the closed ring body 2.2 as the annular blade segments 3.1-3.3, and are different from The material of the closed loop 2.2 is made of the same material as the annular edge sections 3.1-3.3.

Ideally, the annular blade section constituting the first annular blade 2.1 and the annular blade section 3.1-3.3 of the second annular blade adopt the same embodiment and are arranged opposite to the latter.

The edge of the first annular blade 2.1 and the edge of the annular blade section 3.1-3.3 constituting the second annular blade abut the lens in a contact trajectory formed by the above-described manner without gaps and without significant retention.

In order to hold the lens in a substantially gap-free and force-free manner even within the operating temperature range in the event of thermal expansion, the first annular blade 2.1 and the three annular blade regions must be changed in a corresponding manner. The relative positions of the second annular blades formed by the segments 3.1-3.3 are such that the edges remain in abutment against the lens without gaps along the contact tracks. That is, the diameter at which the edges are located and the spacing between the edges must vary depending on the expansion of the lens, which expansion is determined by the expansion coefficient α _{1 of} the lens and its radius r. To this end, according to the first embodiment, the abutment ring 2 having the first annular blade 2.1 and the three annular blade segments 3.1-3.3 are made of materials having different coefficients of thermal expansion α ₂ , α ₃ , The abutment ring 2 is correspondingly dimensioned in the radial length units in which the annular blade segments 3.1-3.3 are radially expanded.

The lens has a first expansion coefficient α ₁ , the seat ring 2 has a second expansion coefficient α ₂ and the annular blade segments 3.1 - 3.3 have a third expansion coefficient α ₃ . After selecting the formula _{α 1 <α 2 <α 3} , for example, the following composition: quartz glass lens _{(α 1 = 0.5ppm / K)} , nickel steel support ring 2 _{(α 2 = 1.7ppm / K)} , The annular blade segments 3.1-3.3 are made of aluminum (α ₃ = 2.3 ppm/K), and the difference in expansion on the contact trajectories can be offset by the corresponding selection of the radial length units l ₁ to ₁₄ .

The contact trajectories extend along a circumferential line on either side of the lens and change their position as they expand relative to the axis of symmetry 0, while their relative positions relative to the optically active surface of the lens remain unchanged.

When the lens adopts a predetermined expansion coefficient α ₁ and a predetermined size, it can be influenced by selecting the expansion coefficient of the seat ring 2 and the annular blade segments 3.1-3.3 and sizing the radial length units l _{1 -} l ₄ thereof. The position of the edge of the annular blade section 3.1-3.3 that is in contact with the lens. Accordingly, the position of the contact trajectory of the edge of the first annular blade 2.1 with the lens can only be influenced by selecting the expansion coefficient of the seat ring 2 and its radial length unit.

If the first annular blade 2.1 also adopts a splitting scheme, the effect of the effect can be improved. If the divided first annular blade 2.1 is not built on the support ring 2, it is implemented as a plurality of materials and The individual components connected to the abutment ring further enhance the effect.

In particular, if the two annular blades 2.1 are implemented as a plurality of annular blade segments, A circumferential trajectory around a midpoint of the circumference is set by selecting different radial length units for the annular blade segments, the midpoints of the circumference not coincident with the geometric midpoint of the lens. Thereby the lens can be held in position relative to the other axis passing through the midpoint of the circumference.

Thus, the lens can be held unstressed in the operating temperature range by using a suitable material combination and sizing for the support 4.

During transportation and storage, temperature fluctuations such as -20 ° C to +60 ° C occur in the extended temperature range, which may cause eccentricity of the lens in the holder 4 and deformation of the lens. Once the temperature returns to the operating temperature range, the deformation disappears and the lens self-centers between the edge of the first annular edge 2.1 and the annular edge section 3.1-3.3.

In other embodiments, the optical member 1 can be held, for example, as a circular planar optical device. At this time, a phase is forcibly set on at least one of the optical effective faces to achieve the effect of the radial shape fitting.

The optical member 1 can also be a quadrilateral or polygonal optical component. In this case, the number of annular blade segments may preferably be four or more. In addition to this, the aforementioned description of the various embodiments of the configuration with lenses also applies here, in which case the radial length unit of the annular support is of course the axis of symmetry 0 and the edge of the annular blade. The arrangement of the annular blades also matches the shape of the perimeter of the optical member 1.

The abutment 4 is connected to the housing part 5 via three circumferentially uniformly arranged elastic retaining elements 6.1-6.3, which are self-centeringly held by the holding elements 6.1-6.3. The holding elements 6.1-6.3 are connected to the support 4 via the support side joints 8.1-8.3 and to the housing part 5 via the housing side joints 7.1-7.3. The retaining elements 6.1-6.3 are constructed such that the radial stiffness is relatively small, but the stiffness in the axial and tangential directions is extremely large, whereby the support can be realized inside the housing part 5 The dynamics of the seat 4 are easy to determine the centering position. As shown in Fig. 3a, the retaining elements 6.1-6.3 can be tangentially connected to the support in a manner that unilaterally abuts the support 4. With this solution, any compensating motion causes the support 4 to be opposed to the housing component. 5 Perform a slight rotation. The retaining elements 6.1-6.3 can also be coupled to the mount in a manner tangentially bilaterally abutting the mount 4 as shown in Figure 3b, thereby preventing the mount 4 from rotating about the optical axis. In this case, however, the tangential stiffness of the retaining elements 6.1-6.3 will be reduced. After the support 4 has a circular structure, the force generated by the elastic compensation motion of the holding member 6.1-6.3 is absorbed by the support 4 itself. Therefore, the lens is basically unaffected by the force applied.

In order to achieve the lateral alignability of the support 4 and the lens, the housing side joints 7.1-7.3 of the holding elements 6.1-6.3 are respectively arranged on an adjusting unit 9.1-9.3, and the adjusting units can respectively pass an adjustment Element 10.1-10.3 moves radially.

FIG. 4 shows an embodiment of a construction group having a retaining element 61-16.3 as shown in FIG. 3b, incorporating an adjustment unit 9.1-9.3 and an adjustment element 10.1-10.3 embodied here as an adjusting screw. The support 4 is laterally calibrated by independent, targeted movement of the adjustment units 9.1-9.3. That is, if a housing side joint 7.1-7.3 moves radially, the position of the lens transversely relative to the optical axis changes, wherein this movement is also compensated by the deformation of the retaining elements 6.1-6.3. The restoring force is absorbed by the holder 4.遂 Keep the lens unstressed. When the housing side joints 7.1-7.3 adopt the tangential movable support scheme, the same effect can be achieved if the arrangement of the retaining elements 6.1-6.3 with one side support is selected.

The retaining elements 6.1-6.3 and the adjusting units 9.1-9.3 are preferably implemented as solid state hinge means for adjustment and compensation movement in a frictionless manner.

This embodiment is in accordance with the subject matter described in the introduction to the specification, and the invention is based on a solution to this subject.

0‧‧‧Axis axis

1‧‧‧Optical components, such as lenses

2‧‧‧Support ring

2.1‧‧‧First ring blade

2.2‧‧‧Act

3.1-3.2‧‧‧ring blade section

4‧‧‧Support

α ₁ ‧‧‧first expansion coefficient = expansion coefficient of the lens

α ₂ ‧‧‧second expansion coefficient = expansion coefficient of the bearing ring

α ₃ ‧‧‧ Third expansion coefficient = expansion coefficient of the annular blade section 3.1-3.3

l ₁ ‧‧‧first radial length unit

l ₂ ‧‧‧second radial length unit

l ₃ ‧‧‧ third radial length unit

l ₄ ‧‧‧fourth radial length unit

R‧‧‧ lens radius

Claims (8)

An optical construction group for compensating for thermal effects, comprising an optical member (1) having a first expansion coefficient (α ₁ ) held in a seat (4) by a shape fitting in an operating temperature range, The support (4) comprises a seat ring (2) comprising a symmetry axis (0) and a first ring edge (2.1), and at least three rings fixedly connected to the seat ring. Blade segments (3.1-3.3) which together form a second annular blade, the first annular blade (2.1) and the annular blade segments (3.1-3.3) to form a contact track Abutting against the optically effective faces of the opposite arrangement of the optical member (1), the seat ring (2) has a second expansion coefficient (α ₂ ), the annular blade segments (3.1-3.3) having a third expansion coefficient ( α ₃ ), and (α ₁ ) < (α ₂ ) < (α ₃ ), wherein the abutment ring (2) and the annular blade segments (3.1-3.3) have relative to the axis of symmetry (0) In terms of radial length units (l _{1 -} l ₄ ), the radial length units are based on the size of the optical member (1) and the coefficients of expansion (α ₁ ), (α ₂ ), (α ₃ ) And sized to make the optical member (1) and the holder (4) The difference in expansion is offset on the contact tracks, and a housing part (5) and three holding elements (6.1-6.3) that connect the housing part (5) to the support (4) are provided. . An optical construction set according to claim 1, characterized in that the first annular blade (2.1) and the annular blade segments (3.1-3.3) are disposed in the region of the optical member (1) There is a phase. The optical construction set of claim 1 is characterized in that the first annular blade (2.1) is embodied as a plurality of annular blade segments formed on the abutment ring (2) and correspondingly having the second expansion Coefficient (α ₂ ). An optical construction set according to claim 3, characterized in that the first annular edge (2.1) embodied as a plurality of annular blade segments is equivalent to the second ring in the number and embodiment of the annular blade segments. The ring edge section (3.1-3.3) of the blade has a corresponding third expansion coefficient (α ₃ ). The optical construction set according to claim 1 is characterized in that the holding elements (6.1-6.3) are arranged in tangency with the support (4). An optical construction set according to claim 5, characterized in that the center of the holding elements (6.1-6.3) is closely connected to the support (4) through a seat side joint (8.1-8.3), respectively, and There is a housing side joint (7.1-7.3) at each end, and the shell side joints are respectively fixed on an adjusting unit (9.1-9.3), and the adjusting units can respectively pass through an adjusting component (10.1). -10.3) moves radially in the housing part (5). An optical construction set according to claim 1, characterized in that the optical member (1) is made of quartz glass, the support ring (2) is made of nickel steel, and the annular blade segments (3.1- 3.3) Made of aluminum. The optical construction set of claim 6 is characterized in that the holding elements (6.1-6.3), the adjusting units (9.1-9.3) and the housing part (5) adopt a one-piece embodiment, wherein These joints (7.1-7.3) and (8.1-8.3) are solid hinge devices.