Patent ID: 11940619
Assignee: ROBERT BOSCH GMBH
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A production method for a mirror device, comprising the following steps:
developing a pivotably mounted micromirror of the mirror device, which has a reflective surface upon which a beam of light emitted by a light source of the mirror device or by an external light source impinges during an operation of the mirror device in such a way that when the micromirror is excited from a neutral position of the micromirror to an oscillatory motion about an axis of rotation, a first impingement angle of the beam of light impinging upon the oscillating micromirror varies within a first value range; and
positioning a cover element which is immovable in relation to a mounting of the micromirror and is transparent to the beam of light emitted by the light source relative to the micromirror in such a way that the beam of light emitted by the light source impinges through the cover element upon the reflective surface of the micromirror, is reflected at the reflective surface to an inner surface of the cover element, and a portion of the light impinging upon the inner surface is reflected at the inner surface onto the reflective surface as a reflection beam, the cover element being aligned at an incline at an angle of inclination in relation to the micromirror situated in its neutral position;
wherein the angle of inclination is specified in such a way that a second impingement angle of the reflection beam impinging upon the oscillating micromirror varies within a second value range; and
wherein the reflective surface of the micromirror is at least partially covered with a coating, which has a reflection coefficient of at least 0.6 for the first value range, and a reflection coefficient of maximally 0.4 for the second value range.