Abstract: Disclosed is an apparatus for light-beam scanning microscopy including a microscope objective and a movement system for moving an excitation light beam. The movement system for moving the excitation light beam includes a first focusing optical component suitable for focusing the excitation light beam in an intermediate focal plane, another focusing optical component suitable for forming an image of the intermediate focal plane in a focal plane of the microscope objective and a single scanning mirror arranged between the first optical component and the intermediate focal plane, the scanning mirror being mounted on a stage, the orientation of which can be adjusted, so as to move the image of the focusing point in two transverse directions in the object focal plane or in the image focal plane of the microscope objective.

Abstract: The present invention relates to a method and optical device for Raman spectroscopy and for observing a sample, said device including an optical means for superimposing an excitation laser beam having a spectral band B0 and an observation beam having a spectral band BV so as to form a combined excitation and observation incident beam, and an optical separation means arranged in the path of a collected beam coming from scattering on the sample and including a first filtering means, a second filtering means capable of spatially separating said collected beam into a first secondary beam and two tertiary beams, each of which includes a spectral band selected from the spectral band B0 of the laser, the spectral band BV of the observation beam, and the spectral band BR of the Raman scattering beam, respectively.

Abstract: A method of microscopy and an illumination optical device with a hollow cone for a microscope, the illumination device includes a first conical lens (1) able to receive a collimated incident light beam (10) and form a conical light beam (20), a second conical lens (5) arranged in such a way as to receive the conical light beam (20, 40) and to form a cylindrical light beam with a black background (50) and an optical lens (6) having an image focal plane (12) arranged in such a way as to receive the cylindrical light beam with a black background (50), to form a hollow cone light beam (60) and to focus the hollow cone light beam (60) into a point (18) in the image focal plane (12).

Abstract: A method of microscopy and an illumination optical device with a hollow cone for a microscope, the illumination device includes a first conical lens (1) able to receive a collimated incident light beam (10) and form a conical light beam (20), a second conical lens (5) arranged in such a way as to receive the conical light beam (20, 40) and to form a cylindrical light beam with a black background (50) and an optical lens (6) having an image focal plane (12) arranged in such a way as to receive the cylindrical light beam with a black background (50), to form a hollow cone light beam (60) and to focus the hollow cone light beam (60) into a point (18) in the image focal plane (12).

Abstract: The present invention relates to a method and optical device for Raman spectroscopy and for observing a sample, said device including an optical means for superimposing an excitation laser beam having a spectral band B0 and an observation beam having a spectral band BV so as to form a combined excitation and observation incident beam, and an optical separation means arranged in the path of a collected beam coming from scattering on the sample and including a first filtering means, a second filtering means capable of spatially separating said collected beam into a first secondary beam and two tertiary beams, each of which includes a spectral band selected from the spectral band B0 of the laser, the spectral band BV of the observation beam, and the spectral band BR of the Raman scattering beam, respectively.

Abstract: The invention relates to a device for the positioning of optical elements with retractable stop enabling accurate positioning of an optical element selected among a plurality of optical elements, including a stand (1); a turret fitted with a element holder and a disc (4), said disc (4) being a ratchet wheel having a peripheral surface (5) fitted with a plurality of blocking means (6), each blocking means (6) corresponding to an optical element, a motor (7) and a crash stop (9) bearing against the peripheral surface of the disc (5). According to the invention the stop (9) contains an anti-friction element (13) in contact with the peripheral surface (5) of the ratchet wheel so that the retractable stop (9) moves according to the contour of the peripheral surface (5) of the ratchet wheel without any friction.

Abstract: The invention relates to a device for the positioning of optical elements with retractable stop enabling accurate positioning of an optical element selected among a plurality of optical elements, including a stand (1); a turret fitted with a element holder and a disc (4), said disc (4) being a ratchet wheel having a peripheral surface (5) fitted with a plurality of blocking means (6), each blocking means (6) corresponding to an optical element, a motor (7) and a crash stop (9) bearing against the peripheral surface of the disc (5). According to the invention the stop (9) contains an anti-friction element (13) in contact with the peripheral surface (5) of the ratchet wheel so that the retractable stop (9) moves according to the contour of the peripheral surface (5) of the ratchet wheel without any friction.