For example, we need to change the size of the target in the picture during the shooting process. Using a fixed-focus lens requires the photographer to move his position back and forth; while using a zoom lens only requires us to change the focal length of the camera.

Infrared lensglasses

The larger the focal length is, the narrower the viewfinder range gets, and the smaller the field of view of the captured picture will be. So fewer scenes can be captured, but the proportion of the scene in the picture is very large.

Infrared lensmaterial

What Michelson was advocating for was higher precision in scientific measurements. The answer to his call came over half a century later in 1960 with the invention of the laser. Since then lasers have become synonymous with precision and not just in the scientific community, fiber optic communication, consumer electronics and even the Internet are all built around the laser. The Ultrafast Laser Lab’s research aims to continue the laser revolution, using laser optics to advance science on two fronts:

Infrared lensfilter

Short optical pulses are produced by compressing a submicrosecond duration pulse into 100 femtoseconds. That corresponds to an intensity increase greater than one million. Also, since the optical source is a laser, all the energy can be focused into a spot size comparable to the wavelength of light. The result is a beam with an intensity measured in TW/cm2. Such an intense beam seriously perturbs any matter it interacts with, moving our exploration into the nonlinear regime. We now have access to excited states of the system, can read out novel information about system symmetry, and can bridge transitions that normally would be forbidden. We can control the system in novel and often counter-intuitive ways, and read out information from the system that would normally remain hidden.

However, despite sustained industrial investment, SLM part quality continues to suffer from inconsistency across individual parts, build volumes, machines and facilities. Even after time and capital intensive optimization, which is often specific to a given part, machine and/or material, the complex interplay of the physical phenomena underlying the process can still lead to stochastic outcomes. Robust and quantitative process monitoring and feedback control are essential tools required to overcome these challenges.

Infraredfilter app

Research in ultrafast is truly cross-disciplinary since ultrafast processes are relevant in a wide range of fields, from semiconductor technology to bioprotein functionality. A key focus of our research is into the ultrafast of the ultrasmall. Man-made nanostructures provide a fascinating playground into the laws of quantum mechanics. Being small provides a complete new functionality and generates new applications all through novel ultrafast dynamics.

We apply inline coherent imaging (ICI) to SLM when it is happening to track performance in real-time. ICI has a proven track record including successful commercialization in the fields of laser welding, cutting and micromachining. It promises to help unravel the complicated dynamics at the heart of laser 3D writing so we can build more complicated devices with a particular eye to novel materials.

InfraredFilter forcamera

We all know that the imaging principle of camera is pinhole imaging, so in a digital camera, the focal length refers to the distance from the lens pinhole to the sensor, and the unit is mm (millimeter).

Infrared camera modules developed by GSTiR team offer wide variety of lens types, such as fixed focus lens, zoom lens, motorized lens etc.

Selective laser melting (SLM) is a variant of additive manufacturing (AM) that has drawn considerable attention from industry over the past decade. SLM promises to consolidate many-step, complex manufacturing processes, which are often spread out over many facilities, into one single machine, allowing for direct 3D design to final part production. It offers engineers also limitless design freedom, whether it be custom hip implants or rocket engines.

Infraredeyelens

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In this thermal image, as the focal length decreases, the field of view of thermal image becomes larger and larger, and more scenes can be captured by the infrared camera, but the target being captured will become smaller.

The smaller the focal length is, the wider the viewfinder range gets, and the wider the field of view of the captured picture will be. So more scenes can be captured, but the scene is very small in the picture.

Generally, the focal length will be marked on the camera lens, such as 50mm, 24-70mm, etc. If there is only one number on the lens, it means that it is a fixed-focus lens, such as a 50mm lens, which means that the lens can only be fixed at a focal length of 50mm.

If there are two numbers marked on the lens, it means that it is a zoom lens, such as a 24-70mm lens, which means that the focal length of this lens can be adjusted freely between 24-70mm.

When it comes to camera lenses, some people may know that there are fixed-focus lenses and zoom lenses. A fixed focal length lens means that the focal length is fixed, while a zoom lens means that the focal length of the lens is variable.