DD140088A1 - VERSION FOR OPTICAL COMPONENTS HIGH PERFORMANCE - Google Patents

Abstract

The invention is especially in high performance lenses applicable to those caused by thermal stress uncontrollable non-reversible optical displacement Components through the use of materials for sockets optical components that have approximately the same coefficient of expansion like the glass of the optical component to be captured, too minimize. The solution is that the annular socket of each optical component of two to the optical component coaxial rings, of which the optical component adjacent ring, at least one optical component has a close thermal expansion coefficient »

Description

Title j Fit for high performance optical devices

Field of application of the invention:

The invention relates to a socket for optical systems which are used in particular in high power lenses.

Characteristic of the known technical solutions: In imaging systems with a diameter of up to 200 mm, each lens of a lens is arranged in a separate metal frame. The lenses are fitted into the sockets and fastened by means of a pre-screw ring or burr. Due to different coefficients of expansion of glass and metal occurs at temperature differences between the temperature in the production of operating and transport temperature or storage temperature of the optical system to changes in position between the lens barrel and socket and between socket and lens. Under thermal stress, shifts that are uncontrollable and irreversible occur within the optical system. The optical performance of high-performance lenses is adversely affected by thermal stress «

Aim of the invention ^.

The object of the invention is to avoid or minimize the influence of temperature on the position of the optical components in high power lenses.

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Essence of the invention:

The invention has the object to make the versions of the individual optical components so that caused by thermal stresses uncontrollable, non-reversible displacements of the optical components are largely avoided. According to the invention, the object is achieved by an annular cylinder mounted in an annular socket for each optical component consists of two coaxial to the optical component rings of different material and different _ψ diameter, of which the optical component adjacent ring angeordnete a optical component at least obvious thermal expansion coefficient -having·

The invention is advantageously designed by the fact that the ring adjacent to the optical component is only partially covered by the second ring.

The material of the frame adjacent to the optical element has a coefficient of expansion at least obvious to the glass of the optical element. Such materials are titanium, gray or pearl casting and steel. These materials are difficult to machine, a chip removal of 0.01 mm is not possible · This negatively affects the fit quality of the annular frame and lens barrel. The ring-shaped sockets of these materials, which are close to the optical component, are therefore fitted with rings of readily machinable material. These rings, of cylindrical design, surround the ring adjacent to the optical component and realize the necessary fit between the annular socket and the objec iv cylinder can also be designed as profile rings with a cylindrical outer surface and perpendicular to the optical axis end face, whereby the optical component

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adjacent ring is partially covered by the second. As a result, the air spaces between two annular laßungen for the optical components are realized within the Füllfassung for high-performance lenses, on the other hand, the necessary fit between the annular fit and lens cylinder can be realized. These rings are designed in such a way that their dimension only has a subordinate influence on the dimensional change under temperature load, the possible expansion of this material is below the modulus of elasticity and permanent deformation is ruled out.

Embodiment;

The invention will be explained with reference to the following drawings. Show it:

Fig. 1 is a schematic sectional view

an embodiment of the version according to the invention for an optical component.

Fig. 2 is a schematic sectional view of another embodiment

the socket according to the invention for an optical component »

To Figure 1 is at both end faces of a socket part 1, the material of the thermal expansion coefficient <* of the glass of a composing optical device 3 is at least near © attached a thin profile ring 2 and 5 made of brass · The rings partially comprise part of the end face and a part of the cylindrical surface of the socket part 1. The surfaces 2 * and 5 * of the profile rings 2 and 5 realize the corresponding fit and guide in a lens cylinder 4 · The surface 2 "and 5" are used to rest on adjacent, for simplicity, not shown, versions , At surfaces 2 "and 5" the air spaces between the individual optical members are realized ·

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In Figure 2, a thin profile ring 2 and 5 made of brass is attached to both end faces of a socket part 1 whose material is at least close to the coefficient of thermal expansion & of the glass of the mounted optical element 3 · The surfaces 2 "and 5" are used for installation to neighboring frames, on these surfaces the air spaces between the individual optical members are realized · For centering and fitting in a lens cylinder 4 · a ring of brass 6 with its outside diameter 6 * # is used

Claims (2)

-5- 209 417 Claim for invention: 1 «Ring-shaped socket for optical components in high-performance lenses, which is mounted in a lens barrel, characterized in that the annular socket of each optical component of two optical components coaxial rings of different material and different diameter, of which the optical component adjacent arranged ring a rotation coefficient which is at least obvious to the optical component 2. Ring-shaped socket according to item 1, characterized in that the ring located adjacent to the optical component is partially enclosed by the second ring. For this /! Page drawing