The difference between laser focusing lenses and laser collimating lenses

Laser light refers to optical components and devices used in the internal and external optical paths of lasers, such as laser focusing lenses, reflecting lenses, beam expanders, laser cutting heads, etc.As a single wavelength light source, laser has good coherence performance and is widely used in scientific research, industry and other fields.

Laser focusing lenses:

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

Laser focusing mirror is an optical element that can compress divergent laser 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 converge the light beams at the end of the fiber, controlling 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 composite focusing lens. Sometimes, an aspheric focusing lens is also used. From the perspective of usage effect, the aspheric lens has the best effect, followed by a composite focusing lens.

Spherical Focusing lenses:

For focusing mirrors used in fiber optic laser optical systems, the substrate is fused quartz material, and double-sided coating is used to reduce spherical aberration as much as possible. Usually, we recommend customers to use dual lens combination spherical lenses.

Aspheric focusing lenses:

The focusing mirror used in fiber optic laser optical systems is made of fused quartz material and coated with a double-sided antireflective film. Based on aspheric applications, it will not introduce spherical aberration in the transmission wavefront and achieve maximum diffraction performance. Single piece aspheric lenses can completely replace traditional multi piece spherical combination lenses from substrate to processing and coating. We strictly control the quality of the lenses to ensure the highest quality lenses provided to customers. These lenses are widely used in laser cutting Laser welding, laser cladding, laser quenching, etc

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The function of laser focusing lenses:

1. Improve the ability of detectors with edge light speed incidence

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

3. The uniform illumination of the detector’s photosensitive surface can be homogenized. Let’s take a look at the difference between laser collimators

Laser collimator:

The collimator is also one of the core accessories for fiber laser engraving machines, cutting machines, marking machines, welding machines, and other laser equipment

Used in various optical measurement systems, it is often used to collimate the optical path, making the divergent optical path parallel. By combining different optical components, the beam collimation of different measurement processes can be optimized.

In order to improve fiber coupling efficiency and reduce beam divergence angle, fiber optic ports need to be equipped with fiber optic collimators.

Fiber optic collimators have the following significant characteristics:

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

2. Good consistency, with a working distance consistency greater than 99%

3. High laser transmittance, high damage threshold, applicable to 10000%

4. Good laser collimation effect, less than 1/10 wavelength;

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Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.

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