Device for adjusting light path and method thereof

Abstract

The invention provides a device for adjusting light path and a method thereof. The invention comprises a laser, a light spot detector and a monitor, wherein, the laser is used for generating laser beams irradiated to the light spot detector; the light spot detector is used for receiving the laser beams and then converting the received laser beam information to electrical signals and transmitting the electric signals to the monitor; and the monitor is connected with the light spot detector so as to convert received electrical signals to images. The light path adjusting method based on the device is characterized in coaxial measurement, and compared with traditional methods, the light path adjusting method of the invention is capable of eliminating Abbe error, improves adjustment precision, is easier to operate and is favorable to practically popularize.

Description

technical field [0001] The invention relates to the field of optical system adjustment, in particular to a device and method for optical path adjustment. Background technique [0002] Whether it is geometric optics experiment or physical optics experiment, it is often necessary to adjust the optical path related to the coaxial spherical system. A so-called coaxial spherical system comprises at least one optical system, such as a lens, comprising a refractive sphere. In order to obtain images with good quality, the main optical axes of each optical element in the coaxial spherical system should be on the same straight line. [0003] For safety reasons, the traditional adjustment method generally does not use human eyes to observe the optical path, and some lasers are not visible to human eyes, so generally the operator holds the probe (a detection plate that converts non-visible light into visible light, Also known as the photosensitive plate) to detect whether the beam pas...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this method are: 1) The same point of the probe cannot receive laser irradiation for a long time, otherwise it will be saturated and the light spot will gradually disappear

Therefore, it is necessary to keep moving the human hand to change the position of the beam on the detector, and the shaking of the human hand will cause inaccurate judgment

2) When it is necessary to align the collimated light and the divergent light on the same axis, it is necessary to move the probe along the direction of the optical path and judge the spatial position of the spot of the divergent light, because the probe cannot accurately reflect the information of the spot (diameter, spatial position, etc.) , causing a larger error

This traditional method of using CCD to adjust the optical path overcomes the error caused by hand shaking caused by using the probe, but due to the axis of the measuring instrument, that is, the CCD106, and the object to be measured, that is, the helium-neon lasers 101 and 102, formed on the diffuser plate 105 The axes of the spots are not on the same line, this off-axis detection introduces the so-called "Abbe error", which is larger when correcting for diverging light to be on-axis with collimated light

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