US 2013/0153758 A1 · OPTICAL APPARATUS HAVING ADJUSTABLE PINHOLE AND METHOD USING THE SAME

Abstract

An optical apparatus for adjusting the position and aperture of a pinhole and a method using the same are provided. A light beam is provided. The light beam is focused on an object and reacts with the object to form a signal beam. The signal beam is focused and projected on a liquid-crystal switch. The projection position of the signal beam on the liquid-crystal switch is determined, and the transparence of the liquid-crystal switch at the projection position is adjusted to form a transparent area. The signal beam passes through the transparent area and reaches a light detecting unit to form a detecting signal. The aperture of the transparent area is adjusted according to the intensity of the detecting signal. The liquid-crystal switch is driven to move, so that the position of the transparent area in the moving direction of the signal beam is adjusted.

Claims10

Dependent claims

A method for adjusting the position and aperture of a pinhole, comprising:

providing a light beam;
focusing the light beam on an object and reacting with the object to form a signal beam;
focusing and projecting the signal beam on a liquid-crystal switch;
determining the projection position of the signal beam on the liquid-crystal switch and adjusting the transparence of the liquid-crystal switch at the projection position to form a transparent area;
enabling the signal beam to pass through the transparent area and reach a light detecting unit to form a detecting signal;
adjusting the aperture of the transparent area according to the detecting signal;
and
moving the liquid-crystal switch to adjust the position of the transparent area in a moving direction of the signal beam.

5 more elements

An optical apparatus for adjusting the position and aperture of a pinhole, comprising:

a light source for generating a light beam;
an imaging unit for focusing the light beam on an object and reacting with the object to form a signal beam;
a liquid-crystal switch located in a moving direction of the signal beam for the signal beam to be projected on the liquid-crystal switch;
a processing unit for determining the projection position of the signal beam on the liquid-crystal switch and adjusting the transparence of the liquid-crystal switch at the projection position to form a transparent area;
a light detecting unit for receiving the signal beam passing through the transparent area to form a detecting signal, wherein the processing unit is coupled to the light detecting unit and adjusts the aperture of the transparent area according to the detecting signal;
and
an actuator coupled to the liquid-crystal switch, wherein the actuator drives the liquid-crystal switch to move, so that the position of the transparent area in the moving direction of the signal beam is adjusted.

4 more elements

Dependencies are inferred from the claim text.

Optical apparatus having adjustable pinhole and method using the same

Life of this patent

Optical apparatus having adjustable pinhole and method using the same

Life of this patent

Abstract

Claims10