Patent EP-3682284-A2 (EP)
Inventor: DOBEK KRZYSZTOF
IPC: G02B21/02
Filed: 2018-08-28
Abstract: The subject of the invention is a method of creating a multi-planar image by using varifocal lenses and a device to realize the method, having application in the optical industry. Image forming method using a multi-planar varifocal lens, characterized in that the beam of light rays coming from any light source is directed to observed object (1), which reflects or transmits part of these light rays, on the path of which at least one diverging or converging type AGRIN lens 6' and at least one converging lens of classical or AGRIN type are placed, in such a way that light rays reflected from or passed through a part of observed object (1) pass through the AGRIN lens 6', and the light rays reflected or passed through the remaining part of the observed object (1) do not pass through the AGRIN lens 6', however, they penetrate through the AGRIN plate (5) in the region of homogeneous ∇n refraction index, with all of the rays that pass through the AGRIN plate (5) having passed through previously, or passing through at least one classical or AGRIN type converging lens, and as a result of which, the rays from the observed object (1) that passed through the AGRIN lens 6' form a sharp image 4" of the part of the observation object (1) at a different imaging distance measured from the second plane of the main AGRIN lens 6', and the rays from the observed object (1) do not obscure the AGRIN lens 6', and they form a sharp image of a fragment of the observed object at the same image distance measured from the second plane of the main AGRIN lens 6', in which image 4' of the second observed object 1' appears, located in a different plane than the observed object 1', all light rays that pass through the optical system used for imaging pass through the AGRIN lens 6', which then participate in creating a sharp image 4' of the observed object 1' in one image plane, identical to the plane in which a sharp image 4 of a part of the observed object 1 was created, after placing the next AGRIN lens 6" in the AGRIN plate 5 with a properly selected focal length, all light rays reflected from, or passing through, a fragment of another observed object 1"' that passes through the optical system used for imaging and passes through the AGRIN lens 6" form an image of this part of the observed object 1"' at the same imaging distance measured from the second plane of the main AGRIN lens 6', in which the image of the object and a part of object (1) is created. A multi-planar image creation device using a varifocal lens containing a laser light source, a holder sliding in two perpendicular directions, an optical element transmitting imaged light over a wide spectral range, and reflecting laser light, an AGRIN plate, a laser-impermeable filter and a housing holding the components at fixed mutual distances, characterized in that the laser light source is a fiber optic collimator (17) connected to an external laser, which is mounted in a sliding holder (18) operating in two directions perpendicular to the direction of the laser beam (8) coming out of the laser light source, which is fixed to the sliding holder (18) with a clamp (19), an optical element (9) is located in the housing (22) in such a way that it transmits the imaged light beam (7) and reflects the laser beam (8), and the AGRIN plate (5) is mounted in the housing (22) in such a way that the laser beam (8) falls on it perpendicularly and behind the AGRIN plate (5), located in the housing (22), is a filter (12) absorbing the light of the laser beam (8) through the optical element (9).