US 11,927,735 B2
Acousto-optical device and method
Manuel Kremer, Leimen (DE); and Felix Neugart, Mannheim (DE)
Assigned to LEICA MICROSYSTEMS CMS GMBH, Wetzlar (DE)
Appl. No. 16/962,245
Filed by Leica Microsystems CMS GmbH, Wetzlar (DE)
PCT Filed Jan. 15, 2019, PCT No. PCT/EP2019/050868
§ 371(c)(1), (2) Date Jul. 15, 2020,
PCT Pub. No. WO2019/138119, PCT Pub. Date Jul. 18, 2019.
Claims priority of application No. 10 2018 100 762.0 (DE), filed on Jan. 15, 2018.
Prior Publication US 2021/0063715 A1, Mar. 4, 2021
Int. Cl. G02F 1/33 (2006.01); G02B 21/00 (2006.01); G02F 1/11 (2006.01)
CPC G02B 21/0064 (2013.01) [G02B 21/0032 (2013.01); G02B 21/0036 (2013.01); G02F 1/116 (2013.01); G02F 1/33 (2013.01); G02B 21/0076 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A microscope, comprising:
a pulsed light emitting laser light source with a pulse duration of ≤1000 fs, the pulsed light emitting laser light source being configured to provide an incident light beam; and
an apparatus for reducing a chromatic spread angle of light diffracted at an acousto-optic element, the apparatus comprising:
the acousto-optic element which is disposed in a beam path of the incident light beam and is configured to generate the diffracted light from the incident light beam such that the diffracted light emanates from a virtual interaction point of the acousto-optic element; and
a first and a second focusing optical unit, the first focusing optical unit being disposed in the beam path upstream of the acousto-optic element and the second focusing optical unit being disposed in the diffracted light such that a focus of the incident light beam is situated downstream of the first focusing optical unit in the acousto-optic element and the virtual interaction point is located in a front focus of the second focusing optical unit.