The difference between laser collimating lens and laser collimating lens

The difference between laser collimating lens and laser collimating lens

Lasers are single-wavelength light sources with good coherence properties and are widely used in scientific research and industry. Laser optics generally refers to optical components and devices used in the internal and external optical paths of lasers, such as laser focusing mirrors, mirrors, beam expanders, laser cutting heads, etc.

Laser focusing lens:

Laser focusing mirror is one of the core accessories of fiber laser engraving machine and cutting machine, marking machine, welding machine and other laser equipment. The function is to form a uniform focal point on the entire standard plane. Its main performance indicators are: focal length and scanning range. The focal position depends on both the focal length and the declination angle; the scanning range is proportional to the focal length of the scene. After focusing, The spot diameter is proportional to the focal length, that is, when the scanning area reaches a certain level, the obtained spot diameter is larger.

The laser focusing mirror is an optical element that can compress the divergent laser light in the angular direction. Due to the large emission surface of the fiber, it is a diffuse beam rather than a collimated or focused spot. Fiber laser focusing mirrors can effectively focus the beams at the end of the fiber together and control the output beam in a very small area. According to the requirements of different applications, two or more focusing lenses can be used, and this optical element is called a compound focusing lens, and sometimes an aspheric focusing lens is also used. , followed by the compound focusing lens.

Spherical focusing lens: the focusing lens used in fiber laser optical system, the base material is fused silica material, and the double-sided coating is coated to increase the film.

Aspherical focusing mirror: used for focusing mirrors in fiber laser optical systems, the base material is fused silica material, and the antireflection coating is coated on both sides. Based on the application of aspherical surfaces, spherical aberration will not be introduced in the transmission wavefront and the limit diffraction performance will be achieved. The single-piece aspherical lens can completely replace the traditional multi-piece spherical combination lens. From the base material to the processing and coating, we strictly control the quality of the lens to ensure that we provide customers with the highest quality lenses. These lenses are widely used in laser cutting, laser cutting and coating. Welding, laser cladding, laser quenching, etc.

The role of laser focusing mirror:

1. Improve the ability of detectors with marginal light velocity incidence;

2. In the same main optical system, the additional field lens will reduce the area of the detector. If the same detector area is used, the field of view can be enlarged and the incident flux can be increased;

3. The uniform illumination of the photosensitive surface of the detector can be homogenized.

Let's take a look at the difference between the laser collimator lens?

Laser collimator:

The same collimator is also one of the core accessories of fiber laser engraving machine and cutting machine, marking machine, welding machine and other laser equipment.

Used in various optical measurement systems, it is often used to collimate the optical path to make the divergent optical path into a parallel optical path. With different optics, beam collimation can be optimized for different measurement processes.

In order to improve the fiber coupling efficiency and reduce the beam divergence angle, the fiber port needs to be equipped with a fiber collimator.

Fiber collimators have the following salient features:

1. High beam collimation After adjustment by the fiber collimator, the divergence angle of the beam does not exceed 2°

2. Good consistency, the consistency of working distance is greater than 99%

3. High laser transmittance, high damage threshold, can be applied to 10000 light

4. The laser collimation effect is good, less than 1/10 wavelength;