Mechanical fastening system for modular microoptical elements

G - Physics – 02 – B

Patent

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G02B 7/00 (2006.01)

Patent

CA 2181178

A mechanical fastening system for (micro-)optical elements (3) is presented which for their part are mounted in an individual module in the form of a rectangular parallelepiped (2). Standard components (1) of this type are initially mounted on a stool-like frame, which can for example be in the form of a "tripod" (5) or a "ball leg" (47-49). The frame has a platform (6) from which at least 3 legs can be offset in such a way that they form either spherical segments (40-42) or limbs (7-9) which for their part merge into offset foot areas (10-12). The offsetting carried out creates hinges (13-18, 43-45) which have a flexural characteristic. Further variants provide for "ball- joints" (25-27, 25a-27b) instead of (linear) hinges. The production of a corresponding basic structure (5') for a fastening system based on the object of the invention can be achieved by laser beam cutting or punching a steel sheet. Reinforcement plates can be applied to the surface in the area of the limb (7-9). Side bracing profile pairs (40a, 40b; 41a, 41b; 42a, 42b) can be fitted in the peripheral area (46a-46c) of the spherical segment (40-42) as well. It is also possible to base the construction on thicker sheets when producing the basic structure (5'), and to then subject these to subtractive material machining processes. The proposed fastening system enables uni- or multi-dimensional layouts to be created using automatic placing and fastening technologies.

L'invention concerne un système de fixation mécanique d'éléments (micro)-optiques (3) renfermés dans un module de forme carrée (2). Ces composants standard (1) sont premièrement montés sur un support en forme de tabouret à trois pieds (5) ou à billes (47-49). Le support comprend une plate-forme (6) de laquelle partent en angle au moins trois jambes de façon à former soit des segments d'une sphère (40-42), soit des branches (7-9) qui à leur tour se terminent par des pieds coudés (10-12). Ces coudes forment des charnières (13-18, 43-45) à caractéristiques élastiques de flexion. Dans d'autres modes de réalisation, on utilise des articulations à rotule (25-27, 25a-27b) au lieu de charnières (linéaires). Afin de fabriquer la structure de base (5') de ce système de fixation, on découpe au laser ou par estampage une tôle métallique. Des plaquettes de renforcement peuvent être posées en surface sur la zone des branches (7-9). Des paires de profilés de renforcement latéraux (40a, 40b; 41a, 41b; 42a, 42b) peuvent être prévus dans la zone marginale (46a-46c) des segments d'une sphère (40-42). On peut aussi utiliser des tôles plus épaisses pour fabriquer la structure de base (5') et ensuite soumettre celle-ci à un usinage soustractif. Ce système de fixation permet de réaliser des tracés à une ou plusieurs dimensions avec des techniques automatiques de positionnement et de fixation.

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