For focussing and/or adjusting of the image field of a camera (1) with an image sensor (2) and an objective ( 3), it is proposed to provide light sources (7) between objective (3) and image sensor (2), which are projected into the object plane (5) by means of a partially transmitting mirror (8) arra
For focussing and/or adjusting of the image field of a camera (1) with an image sensor (2) and an objective ( 3), it is proposed to provide light sources (7) between objective (3) and image sensor (2), which are projected into the object plane (5) by means of a partially transmitting mirror (8) arranged between the light sources (7) and the image sensor (2).
대표청구항▼
The invention claimed is: 1. Camera with an image sensor for taking a picture, with an objective for imaging an object on the image sensor and with a device for adjusting the distance between the camera and the object, or for adjusting the objective, comprising a partially transmitting mirror, arra
The invention claimed is: 1. Camera with an image sensor for taking a picture, with an objective for imaging an object on the image sensor and with a device for adjusting the distance between the camera and the object, or for adjusting the objective, comprising a partially transmitting mirror, arranged between the objective and the image sensor, and at least one light source, wherein the partially transmitting mirror is oriented in parallel to the light-sensitive surface of the image sensor, the at least one light source is arranged between the objective and the partially transmitting mirror and emits light towards the partially transmitting mirror, and the distance between the light source and the mirror is as long as the distance between the mirror and the image sensor. 2. Camera according to claim 1, wherein the image sensor and the light source are arranged on different sides of the partially trmsmitting mirror. 3. Camera according to claim 1, wherein the objective, the light source, the partially transmitting mirror and the image sensor are arranged in a straight row. 4. Camera according to claim 1, wherein the adjustment can be performed by viewing the image of the at least one light source projected through the objective, by eye, in the object plane. 5. Camera according to claim 1, wherein the at least one light source has a small light emitting surface. 6. Camera according to claim 1, wherein the at least one light source is shaped in a way that it emits light in a line. 7. Camera according to claim 1, wherein the at least one light source is a light emitting diode. 8. Camera according to claim 1, wherein the at least one light source does not comprise an optical element, e.g. a lens. 9. Camera according to claim 1, wherein it comprises at least three light sources. 10. Camera according to claim 9, wherein the light sources are arranged in a plane parallel to the light-sensitive surface of the image sensor. 11. Camera according to claim 1, wherein the at least one light source is arranged in relation to the image sensor, in a way that its image is projected by the partially transmitting mirror and the objective, onto a position of the object which is in the area of the border of the visual field of the image sensor. 12. Camera according to claim 11, wherein it comprises various light sources arranged in a way that their images are located in the object plane along the outline of the object to be imaged. 13. Camera according to claim 12, wherein it comprises four light sources the images of which are located in the object plane in the corner points of a rectangular visual field of the image sensor. 14. Camera according to claim 1, wherein the at least one light source is arranged in a way that it emits towards the intersection point of the optical axis of the camera with respect to the image sensor. 15. Camera according to claim 1, wherein the at least one light source is arranged on a support comprising an aperture for the optical path, wherein the at least one light source is arranged in the area of the border of the aperture. 16. Camera according to claim 1, wherein the objective is a zoom objective. 17. Method for adjusting the distance between a camera and an object or for adjusting the objective of the camera, wherein the camera comprises an image sensor for taking a picture and an objective for imaging an object onto the image sensor, wherein the camera is equipped with a partially transmitting mirror, arranged between the objective and the image sensor, and at least one light source is provided, wherein the partially transmitting mirror is oriented in parallel to the light-sensitive surface of the image sensor, the at least one light source is arranged between the objective and the partially transmitting mirror and emits light towards the partially transmitting mirror, wherein the distance between the light source and the mirror is as long as the distance between the mirror and the image sensor, and the adjustment of the distance between the camera and the object, or the adjustment of the objective is performed according to the image sharpness of the image of the at least one light source in the object plane. 18. Method according to claim 17, wherein the image sensor and the light source are arranged on different sides of the partially transmitting mirror. 19. Method according to claim 17, wherein the objective, the light source, the partially transmitting mirror and the image sensor are arranged in a straight row. 20. Method according to claim 17, wherein the adjustment can be performed by viewing the image of the at least one light source projected through the objective, by eye, in the object plane. 21. Method for adjusting the position of a camera in relation to an object, wherein the camera comprises an image sensor for taking a picture and an objective for imaging an object onto the image sensor, wherein the camera is equipped with a partially transmitting mirror, arranged between the objective and the image sensor, and at least one light source is provided, wherein the partially transmitting mirror is oriented in parallel to the light-sensitive surface of the image sensor, the at least one light source is arranged between the objective and the partially transmitting mirror and emits light towards the partially transmitting mirror, wherein the distance between the light source and the mirror is as long as the distance between the mirror and the image sensor, and the at least one light source is arranged in relation to the image sensor, in a way that its image is projected by the partially transmitting mirror and the objective, onto a position of the object which is in the area of the border of the visual field of the image sensor, and the position of the camera in relation to the object is adjusted according to the position of the image of the at least one light source projected onto the object. 22. Method according to claim 21, wherein various light sources are used, arranged in a way that their images are located in the object plane along the outline of the object to be imaged. 23. Method according to claim 22, wherein four light sources are used, the images of which are located in the object plane in the corner points of a rectangular visual field of the image sensor. 24. Method according claim 21, wherein the image sensor and the light source are arranged on different sides of the partially transmitting mirror. 25. Method according claim 21, wherein the objective, the light source, the partially transmitting mirror and the image sensor are arranged in a straight row. 26. Method according to claim 21, wherein the adjustment can be performed by viewing the image of the at least one light source projected through the objective, by eye, in the object plane.
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