摘要:
An electro-optic modulator comprises a waveguide (2) of a nonlinear optical material and an electrode line (3) for generating an electrical field in a modulating region (17) of the waveguide (2) when a voltage is applied to the electrode line (3). thereby modulating light passing through the waveguide (2). Therein ▪ the forward electro-optic response of the modulating region (17) is the same as the backward electro-optic response; and ▪ the electro-optic response has a band-pass or a low-pass characteristic. A distance measuring device comprises a light source (101) emitting light, and such an electro-optic modulator arranged such that the emitted Light passes through the electro-optic modulator in a first direction before being emitted from the distance measuring device, and after being reflected from a target passes through the electro-optic modulator in a second direction which is opposite to the first direction.
摘要:
Provided are a three-dimensional (3D) image acquisition apparatus, and a method of generating a depth image in the 3D image acquisition apparatus. The method may include sequentially projecting a light transmission signal, which is generated from a light source, to a subject, modulating reflected light, which is reflected by the subject, using a light modulation signal, calculating a phase delay using a combination of a first plurality of images of two groups, from among a second plurality of images of all groups obtained by capturing the modulated reflected light, and generating a depth image based on the phase delay.
摘要:
An electro-optic modulator comprises a waveguide (2) of a nonlinear optical material and an electrode line (3) for generating an electrical field in a modulating region (17) of the waveguide (2) when a voltage is applied to the electrode line (3), thereby modulating light passing through the waveguide (2). Therein • the forward electro-optic response of the modulating region (17) is the same as the backward electro-optic response; and • the electro-optic response has a band-pass or a low-pass characteristic. A distance measuring device comprises a light source (101) emitting light, and such an electro-optic modulator arranged such that the emitted light passes through the electro-optic modulator in a first direction before being emitted from the distance measuring device, and after being reflected from a target passes through the electro-optic modulator in a second direction which is opposite to the first direction.
摘要:
A distance measuring device comprises a light source (101) emitting light, and such an electro-optic modulator (21, 22, 23) arranged such that the emitted light passes through the electro-optic modulator (21, 22, 23) in a first direction before being emitted from the distance measuring device, and after being reflected from a target passes through the electro-optic modulator (21, 22, 23) in a second direction which is opposite to the first direction. The forward electro-optic response of a modulating region (17) of the electro-optic modulator (21, 22, 23) is the same as the backward electro-optic response, and a centre of gravity of the modulation is independent of modulation frequency.
摘要:
Es wird ein optoelektronischer Sensor (10) zur Erfassung von Objekten in einem Überwachungsbereich (20), insbesondere Laserscanner, mit einem Lichtsender (12) zum Aussenden eines Sendelichtstrahls (18), einem Lichtempfänger (28) zum Erzeugen eines Empfangssignals aus dem von Objekten in dem Überwachungsbereich (20) remittierten Licht (22), einer um eine Drehachse (34) drehbaren Optikeinheit (30) zur periodischen Umlenkung des Sendelichtstrahls (18) in den Überwachungsbereich (20) und des remittierten Lichts (22) aus dem Überwachungsbereich (20) sowie einer Auswertungseinheit (40) angegeben, in welcher anhand des Empfangssignals Informationen über Objekte in dem Überwachungsbereich (20) erfassbar sind. Dabei weist die Optikeinheit (30) einen Sendelichtleiter (14), um den Sendelichtstrahl (18) von dem Lichtsender (12) in den Überwachungsbereich (20), und/oder einen Empfangslichtleiter (26) auf, um das remittierte Licht (22) aus dem Überwachungsbereich (20) zu dem Lichtempfänger (28) umzulenken.