Services and Customization
Services and Customization
Production and Quality

Services and Customization

As for the GLE12014D, can Quanhom replace the other components of the lens as customer required?

     Yes, we can. Whether replacing parts or changing the design of components, Quanhom will try it best to meet your needs and provide you with professional advice and solutions. As one of the advanced opto-mechatronics component companies, we are delighted to serve our global partners with comprehensive services. The GLE12014D lens comes with a motor and a potentiometer, which could be formulated technical solutions according to your demands. Meanwhile, comprehensive testing again is essential to ensure that the lens is in the optimal condition. Besides, the interface can also be changed by replacing the adapter.

Can Quanhom adjust certain details of the eyepiece according to different needs of customers?

Yes, we can. Quanhom believes that customization is not only an essential service, but also what we always pursuit. As one of the advanced opto-mechatronics component companies, we are delighted to serving our global partners matching different OLEDs with comprehensive services. In the past five years, we have offered a variety of customized eyepieces, including replacing eyepiece interfaces, diopter adjustment rings, focus rings and so on. Here are a few examples.(1)Under certain conditions, the specifications of the thread interface can be customized. For instance, the thread interface of GE25 is M29x0.75, and the threaded interface of GE18RL is M31x0.75. It depends on requirements;(2)The diopter range can be adjusted according to needs, such as -5 to -4, -5 to +5, -6 to +2 or other ranges;(3) The appearance or material of the focus ring can be replaced. For example, the focus ring of the GE18 has two types: wide and fine.(as shown in the figure below). If you have any requirements, please feel free to contact us. We will try our best to offer you the optimal service!

How does the QUANHOM team guarantee the stability and consistency of products?

The consistency of products to great content determines the product quality, only high consistent product can offer a better purchasing and user experience for clients. QUANHOM is an infrared specialty team that adheres to the principle of “Quality Foremost; Service Centered; Progress Guided; Innovation Driven” to practically implement the ISO9001 QMS, and severely carry out the quality control procedure—first article inspection, progress inspection, warehousing inspection and warehouse-out inspection. All operations on products correspond with the operation instructions to minimize the uncertain elements in the productive progress, then the stability and consistency of products can be guaranteed.

How long does the dual field lens takes to shift the field of view ? What factors will influence it?

At present, the switching time of the dual field of view lens of the QUANHOM team is ≤3S. There are many factors that influence the parameter. Firstly, for the optical design aspect, the moving distance of the moving lens group plays a defining role in the switching time. Secondly, in the mechanical design aspect, the design of the cam curve and the selection of the electric motor influence a lot on the speed of switching the field of view. Finally, the control of the electric motor and Automatic Focusing Algorithm, to some extent, also exert influence on the speed of switching the field of view.

What is the difference between ordinary and super-large field of view infrared optical lens?

What is the difference between super-large field of view infrared optical lens and ordinary infrared optical lens? A. The infrared optical lens with super large field of view has great distortionB. Has a large negative vignettingC. Need athermalized designD. Different important factors in phase quality evaluation  From: Infrared and Laser Engineering Volume 49 Issue 6 Ultra-large field of view infrared optics

What are the disadvantages of the nested guide mechanism commonly used in continuous zoom lenses?

A. In the continuous zoom process, the distance between each lenses has been strictly determined. At the structural design step, there are strict requirements on the size of the lens group and the lens barrel, and it is not easy to adjustB. Increasing the axial length of the guide rail can make the lens group more stable during the movement, but due to the limitation of the infrared optical design, the lens group has a limited range of movement. Once the range is too small, it will cause transmission problemsC. Under special circumstances, it is necessary to use a zoom lens with nested motion, which increases the complexity of the structure and increases various costs.The shortcomings listed above are only individual phenomena, which can be improved from the source, that is, when carrying out the optical design of the continuous zoom lens, these problems should be taken into account, and the optical design can be carried out on the basis of avoiding these shortcomings. solve these problems. From: Thesis Motion Analysis of the Sliding Guide Mechanism of Infrared Continuous Zoom Lens Infrared Technology May 2020 Vol. 42 No. 5

What scenes can thermal imaging technology be used in?

1. Security monitoring: border security, urban security, coastal monitoring2. Infrared temperature measurement: industrial temperature measurement, human body temperature measurement, intelligent breeding3. Outdoor night vision: outdoor exploration, outdoor observation, outdoor search and rescue4. National defense and coastal defense: border inspections, target retrieval, firearms aiming5. Fire rescue: forest fire prevention, special substance detection, fire rescue6. Visual enhancement: automatic driving, equipment maintenance, medical equipment7. Engineering inspection: water leakage detection, house wiring, artificial intelligence

What are DLC and AR coating?

Diamond-like carbon (DLC) membrane is an amorphous carbon membrane. The membrane contains a certain number of sp3 bonds, giving it a series of excellent properties close to diamond. It has the advantages of low deposition temperature and large area deposition.Among various hard membranes, DLC membrane can be positioned as a membrane material with high hardness and excellent wear resistance and low coefficient of friction.AR (Anti-Reflection) membrane cannot change the absorption rate of the lens itself. It can only increase the transmittance by reducing the reflectance on both sides of the lens, which is the so-called "reflection and antireflection".Light is an electromagnetic wave. By matching the refractive index and thickness of the AR membrane, the light produces multi-beam interference in the AR membrane-destructive interference on the upper surface and constructive interference on the lower surface.

The motor suddenly stops rotating. How do the troubleshoot?

If the motor stops suddenly:1. First check whether the cam of the lens has turned to the limit position.Because the limit switch can disconnect the circuit when the cam turn to the limit position, making the motor unable to run in one direction.2. If the cam of the lens is not in the limit position, check the wiring and power supply. Firstly, check whether the power supply is energized or whether the voltage meets the requirements. If there is the power and the voltage is within the required range, then check whether the solder joints are loose or fall off; If not, Find a well-confirmed wire to short-circuit each wire on the lens, and rule out whether the wires are disconnected one by one.3. If none of the above situations occurs, short-circuit the limit switch of the lens with a cable to observe whether the motor can return to normal and eliminate the cause of damage to the limit switch.4. Use a multimeter to measure the positive and negative output terminals of the motor on the auto-focus control board to check whether the voltage is normal under the condition of input and output.5. Finally, when the motor is running, lightly touch the motor with your hand. If the motor is severely hot, it is likely to be blocked or damaged. Please cut off the power immediately, remove the motor and let it run idling. If it can rotate normally, please check whether there is any foreign matter stuck on the lens structure. If it cannot rotate normally, please replace with a new motor and test again.

What materials are suitable for infrared lenses?

When designing infrared optical components, various factors related to the optical materials used must be considered. These factors include refractive properties, optical transmission, non-thermal properties, hardness/durability, environmental sensitivity, weight/density, manufacturing technology, and cost. Some of these factors are still interrelated. For example, for some materials, their optical transmittance is high at room temperature, but decreases at higher temperatures. Considering all these factors, when designing infrared optical components, careful consideration of material selection is required. Available materials are: germanium (Ge), silicon (Si), gallium arsenide (GaAs) and cadmium telluride (CdTe); zinc compounds, such as zinc sulfide (ZnS) and zinc selenide (ZnSe); water-soluble crystals, such as Potassium bromide (KBr), sodium chloride (NaCl) and potassium chloride (KCl); fluorides such as magnesium fluoride (MgF2), calcium fluoride (CaF2) and barium fluoride (BaF2); and other materials, Such as fused silica and sapphire; chalcogenide glass, etc. The currently available materials are as follows (blue is chalcogenide glass):

What is an AR coating

Anti-reflective coating (English: Anti-reflective coating, AR) is a surface optical coating that increases transmittance by reducing light reflection. In complex optical systems, it can improve contrast by reducing scattered light in the system. Many coatings include transparent film structures with different refractive indices. The thickness of the film determines the wavelength of the reflected light that it acts on. When light is reflected twice on the AR coating, it will interfere with the original reflected light, thereby weakening the reflected light. According to the conservation of energy, the energy of light does not change. Therefore, when the reflected light decreases, the transmitted light increases. This is the principle of AR coating. Generally, when choosing an AR coating, you need to determine the wavelength, such as infrared, visible and ultraviolet.

What is an atmospheric window?

Atmospheric window fefers to some bands of celestial radiation that can penetrate the atmosphere. Due to the absorption and reflection of radiation by various particles in the earth's atmosphere, only radiation from celestial bodies in certain wavebands can reach the ground. Divided into optical window, infrared window and radio window according to their respective scopes.Infrared windowWater vapor molecules are the main absorbers of infrared radiation. Strong water vapor absorption bands are located at 0.71~0.735μ (micron), 0.81~0.84μ, 0.89~0.99μ, 1.07~1.20μ, 1.3~1.5μ, 1.7~2.0μ, 2.4~3.3μ, 4.8~8.0μ. An absorption band of carbon dioxide appears at 13.5~17μ. The gaps between these absorption bands form some infrared windows. The widest infrared window is at 8-13μ (there is an absorption band of ozone near 9.5μ). 17~22μ are translucent windows. After 22μ until the wavelength of 1 millimeter, due to the severe absorption of water vapor, it is completely opaque to observers on the ground. But in places with high altitude and dry air, the radiation transmittance of 24.5~42μ can reach 30~60%. At 3.5 kilometers above sea level, radiation of 330-380μ, 420-490μ, 580-670μ (transmittance of about 30%) can be observed, and 670-780μ (about 70%) and 800-910μ (about 30%) can be observed. 85%) radiation.

How does the MTF curve reflect the performance of the lens?

1. The space enclosed by the MTF curve, the horizontal axis and the vertical axis, the larger the area, the better, and the better the lens imaging performance. The flatter the MTF curve, the better. The flatness indicates the imaging uniformity of the edge and center of the lens.2. The closer the sagittal curve and the meridian curve, the better, and the more consistent the imaging in different directions.3. The low frequency curve represents the contrast characteristics of the lens, and the high frequency curve represents the resolution characteristics of the lens.

How can the thermal imaging module without zooming and automatic focus function realize the automati

Although without zooming and automatic focus function, even installed with a continuous zoom lens or motorized lens, the thermal imaging module can't realize zooming or automatic focus function, We can realize these functions in the case of not changing thermal imaging module by using other subsidiary products like automatic focus control board.The Principle of operation is easy. Connect the motor and potentiometer to the control board, by which sending the command to control the motor. Then the analog video of the thermal imaging module is output to the control board which will analyze the analog video. In the process of the automatic focus, the control board will analyze the position of the focus motor corresponding to the clearest picture, and then control the focus motor running to the position through the control board to complete the automatic focus.As soon as the customer have their needs, we will try our best to meet the need. The Y02 control panel provided by our company have lots of functions:Besides the basic zooming and automatic focus function, it has the present position function, the designated location zooming and focus function, the automatic focus fine tuning function, the automatic reading zooming and focus functions of the upper and lower limits. In order to ensure that our control panel can meet the requirement of the most customer and be suitable for most application scenarios, the temperature compensation function, the encoder motor control function and focal automatic control function are currently being added. Contact us directly if details about the Y02 control board are required.