Abstract: A visual inspection device including a pinhole lens optically coupled to a sensor is provided. The pinhole lens has a pinhole placed at the distal end of the lens to capture the rays from an object to be inspected, a front optical group receiving the rays which cross the pinhole, and a rear optical group. The front optical group is configured to focus, on the rear optical group, the rays which cross the pinhole. The rear optical group is configured to focus, on the sensor, the rays received from the front optical group.

Abstract: A lens device for inspecting an object having at least one end surface and at least one lateral surface, substantially orthogonal to the end surface, is provided. The lens device includes a front optical group, a rear optical group acting as prime lens for collecting beams originating from the front optical group, a stop inserted in the rear optical group, and a sensor plane collecting beams projected by the rear optical group. The front optical group includes only refractive lenses and is formed by at least one front lens configured to receive beams both from the at least one end surface of the object, perpendicular to the optical axis, and from the at least one lateral surface of the object, substantially parallel to the optical axis, and by one or more converging lenses arranged behind the front lens and suitable to focus the beams received towards the rear optical group.

Abstract: A visual inspection device including a pinhole lens optically coupled to a sensor is provided. The pinhole lens has a pinhole placed at the distal end of the lens to capture the rays from an object to be inspected, a front optical group receiving the rays which cross the pinhole, and a rear optical group. The front optical group is configured to focus, on the rear optical group, the rays which cross the pinhole. The rear optical group is configured to focus, on the sensor, the rays received from the front optical group.

Abstract: A visual inspection device including a pinhole lens optically coupled to a sensor is provided. The pinhole lens has a pinhole placed at the distal end of the lens to capture the rays from an object to be inspected, a front optical group receiving the rays which cross the pinhole, and a rear optical group. The front optical group is configured to focus, on the rear optical group, the rays which cross the pinhole. The rear optical group is configured to focus, on the sensor, the rays received from the front optical group.

Abstract: A borescope probe for inspecting a side wall of a cavity includes a primary mirror, a main refractive optical group, a stop, and a sensor plane. The primary mirror collects light rays diffused by a surface of the side wall of the cavity according to an inlet angle (?) and reflects the light rays towards the refractive optical group. The main refractive optical group is placed between the primary mirror and the sensor plane and is suitable to receive the light rays reflected by the primary mirror and focus them on the sensor plane.

Abstract: A lens device for inspecting an object having at least one end surface and at least one lateral surface, substantially orthogonal to the end surface, is provided.

Abstract: A borescope probe for inspecting a side wall of a cavity includes a primary mirror, a main refractive optical group, a stop, and a sensor plane. The primary mirror collects light rays diffused by a surface of the side wall of the cavity according to an inlet angle (?) and reflects the light rays towards the refractive optical group. The main refractive optical group is placed between the primary mirror and the sensor plane and is suitable to receive the light rays reflected by the primary mirror and focus them on the sensor plane.

Abstract: A visual inspection device including a pinhole lens optically coupled to a sensor is provided. The pinhole lens has a pinhole placed at the distal end of the lens to capture the rays from an object to be inspected, a front optical group receiving the rays which cross the pinhole, and a rear optical group. The front optical group is configured to focus, on the rear optical group, the rays which cross the pinhole. The rear optical group is configured to focus, on the sensor, the rays received from the front optical group.

Abstract: A telecentric lens comprises a front optical group adapted to receive rays coming from an observed object, a rear optical group, adapted to convey said rays towards an image plane of a sensor, and a lens aperture positioned between the front optical group and the rear lens group, wherein the lens aperture lies on the focal plane at least of the front optical group. The front optical group is devoid of lenses and is consists of a concave curved primary mirror adapted to receive and reflect the rays coming from the observed object, and at least one secondary mirror adapted to receive and reflect towards the rear optical group the rays coming from the primary mirror.

Abstract: A telecentric lens comprises a front optical group adapted to receive rays coming from an observed object, a rear optical group, adapted to convey said rays towards an image plane of a sensor, and a lens aperture positioned between the front optical group and the rear lens group, wherein the lens aperture lies on the focal plane at least of the front optical group. The front optical group is devoid of lenses and is consists of a concave curved primary mirror adapted to receive and reflect the rays coming from the observed object, and at least one secondary mirror adapted to receive and reflect towards the rear optical group the rays coming from the primary mirror.

Abstract: A telecentric lens comprises a front optical group (20) defining a front optical axis (k), at least a first rear optical group (40), defining a rear optical axis (k?), and at least one lens aperture (30) positioned between the front optical group 20 and a respective rear optical group. Between the front optical group (20) and the lens aperture (30) are inserted at least two reflective or semi-reflective elements arranged in such a way that at least a part of the rays coming from the front optical group undergoes at least one double reflection before reaching the rear optical group (40).

Abstract: A method and a device for the optical viewing of objects, the method comprising the stages of illuminating an object with ultraviolet radiation, and acquiring an image of the object thereby illuminated using a lens comprising at least a forward optical group and an aperture diaphragm exhibiting a transparent window located at a focal point of the forward optical group defined for the ultraviolet radiation.

Abstract: A telecentric lens comprises a front optical group (20) defining a front optical axis (k), at least a first rear optical group (40), defining a rear optical axis (k?), and at least one lens aperture (30) positioned between the front optical group 20 and a respective rear optical group. Between the front optical group (20) and the lens aperture (30) are inserted at least two reflective or semi-reflective elements arranged in such a way that at least a part of the rays coming from the front optical group undergoes at least one double reflection before reaching the rear optical group (40).

Abstract: A telecentric lens (100) comprises a front optical group (112) adapted to receive the rays coming from an object observed and a rear optical group (114) adapted to convey said rays towards a sensor (30). At least one between the front optical group (112) and the rear optical group (114) consists of only two positive focal lenses (112; 114?). An artificial vision device (1) comprises the telecentric lens (100) and a lighting device (20) having a paraboloidal semi-reflector element (22).