Back to results
US 8,265,434 B2Granted
Lens system with position adjustment
AssigneeSchleifring und Apparatebau GmbH
InventorsGregor Popp, Matthias Rank
Life of this patent
Estimating the term…
Abstract
In a lens system, such as for use in optical rotary joints, obliquely tilted cavities are inserted in a light path between light-waveguides and lenses to be coupled thereto in order to compensate lateral displacements between the light waveguides and the lenses. The cavities are filled with an optical medium having a predetermined refractive index in order to achieve a parallel displacement of a light-ray path, so that the ray path passes centrally through the lenses.
Claims11
A lens system comprising:
- a micro-lens array having at least one lens for at least one of coupling light into and coupling light out of at least one light-waveguide;
- at least one cavity defined between two parallel plates and substantially filled with a gas or a liquid medium, the parallel plates being located in a light-ray path between the at least one light-waveguide and the at least one lens;
- wherein the cavity is tilted at an angle with respect to an axis of incidence of light;
- and
- wherein the medium has a refractive index different from a refractive index surrounding the cavity.
2 more elements
An optical rotary joint for transmission of modulated optical signals, comprising:
- two units that are supported to be rotatable relative to each other;
- a rotation compensation optical element;
- and
- at least one lens system comprising:
- a micro-lens array having at least one lens for at least one of coupling light into and coupling light out of at least one light-waveguide;
- at least one plane-parallel cavity having two plates defining an inner space limited by parallel faces and located in a light-ray path between the at least one light-waveguide and the at least one lens;
- wherein the cavity is tilted at an angle with respect to an axis of incidence of light;
- and
- wherein inside the cavity is a gas or a liquid medium having a refractive index different from a refractive index surrounding the cavity.
6 more elements
A lens system comprising:
- a micro-lens array having at least one lens for at least one of coupling light into and coupling light out of at least one light-waveguide;
- at least one plane-parallel cavity having two plates defining an inner space limited by parallel faces and located in a light-ray path between the at least one light-waveguide and the at least one lens;
- wherein the cavity is tilted at an angle with respect to an axis of incidence of light;
- and
- wherein inside the cavity is an optical medium having a refractive index different from a refractive index surrounding the cavity, and wherein the optical properties of the medium in the cavity can be changed by an action from outside the cavity.
2 more elements
Dependencies are inferred from the claim text.