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RSL25-75F1.0-1.2-7
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How to choose infrared lens
When developing a new infrared thermal imager, in the process of forming its solution, engineers and their managers must consider factors such as application conditions, working band, minimum resolution, pixel size, environmental adaptability, mass production capacity, etc. , but affecting these elements is the infrared lens.
The infrared lens is an indispensable part of the infrared thermal imager. Its function is to gather the target infrared radiation onto the infrared detector, and after photoelectric conversion and image processing, finally form an image with good contrast. The quality of the infrared lens largely determines the performance of the infrared camera.
band
Infrared cameras generally work in three wavebands: short-wave, medium-wave, and long-wave. Some infrared thermal imaging cameras used in special places also need to work in multiple bands. The infrared lens should be specially designed according to its working band to optimize performance. The infrared data used by infrared lenses for different wave bands are also different.
Vignetting
The lens forms an image to fill the infrared detector. In general, the focal plane of the infrared detector is a rectangle or a square, while the image formed by the infrared lens is a rotationally symmetrical circular area. The lens must create a diagonal at the detector focal plane that is equal to or larger in diameter than the focal plane array. If the image does not completely fill the detector area, the resulting effect is called vignetting, which incurs a reduction in energy at the edges of the field of view in the image.
Focal Length and Field of View
Infrared lenses are usually identified by their focal length. As the focal length increases, the field of view of the lens narrows (Narrow). Conversely, as the focal length decreases, the field of view becomes wider (Wide).
Infrared lenses can generally be divided into single-field lenses, multi-field lenses, and continuous zoom lenses. Because the infrared continuous zoom lens can complete the search for the target and the continuous tracking of the target at different distances, it is widely used in many fields.
F number
The F number of the infrared lens determines how much of the target radiant energy enters the infrared camera. The smaller the F-number, the larger the size of the infrared lens at the same focal length, and when used with the corresponding detector, the more infrared radiation will be obtained, and the higher the flexibility of the thermal imaging camera will be.
Depth of field
Depth of field is the range of the furthest distance and the closest distance that the lens can see clearly without focusing. The depth of field is not only related to the focal length of the lens, F number, imaging quality and its set alignment imaging distance, but also related to the pixel size of the detector. Generally speaking, the larger the F number, the shorter the focal length, and the larger the pixel size of the detector, the larger the depth of field. With respect to different alignment planes, the range of depth of field is also different.
Applications of infrared lenses include:
Airborne (UAV)
Security and Surveillance
Maritme and Naval Surveillance
Thermal Imaging Devices
Defense
Thermography
Enhanced Vision
LWIR Uncooled Continuous Zoom Lens Parameters
| Product Name | Uncooled Continuous ZOOM Lens |
| Focal Length | 25-75mm |
| F# | 1.0-1.2 |
| Detector | 1024x768-14um |
| Wavelength | 8um-12um |
| Circular FOV | 32°x24.27°~10.92°x8.2° |
| Focus Type | Motorized Adjustable |
| Weight | ≤1.3kg |
| Operating Temperature | -40℃~+60℃ |
| External Coating | DLC |
| Focus motor type and power supply | DC, 12V |
| Zoom motor type and power supply | DC, 12V |
Contact us to get the latest discounts on zoom lenses:
Email: alwson@risingoptics.com
Whatsapp: +86 13952018524
Company Profile:
LWIR Uncooled Continuous Zoom Lens Process Equipment:
1. Inner carving test platform;
2. Microscope;
3. Opto Tech aspheric processing;
4. Polishing machine;
5. Thickness Gauge;
6. Ultrasonic Cleaner;
7. Workshop;
8. Interferometer;
9. High and low tempera ture test chamber;
10. High polishing machine;
11. Optical bench;
12. Raul milling;
13. Atomic force microscope;
14. Centralinstrument;
15. Hand Grinding and Polishing Machine;
FAQ:
Q1: Do you provide samples? Is it free or extra?
A: We will charge as little sample fee as possible, and sometimes we may even provide samples for free. However, you must pay us the courier fee by the following courier methods: DHL, TNT, UPS and FEDEX.
Q2: What if the item is broken?
A: Except for human error, we will replace the defect in a completely new way Within 7 days after you get our products.
How to choose infrared lens
When developing a new infrared thermal imager, in the process of forming its solution, engineers and their managers must consider factors such as application conditions, working band, minimum resolution, pixel size, environmental adaptability, mass production capacity, etc. , but affecting these elements is the infrared lens.
The infrared lens is an indispensable part of the infrared thermal imager. Its function is to gather the target infrared radiation onto the infrared detector, and after photoelectric conversion and image processing, finally form an image with good contrast. The quality of the infrared lens largely determines the performance of the infrared camera.
band
Infrared cameras generally work in three wavebands: short-wave, medium-wave, and long-wave. Some infrared thermal imaging cameras used in special places also need to work in multiple bands. The infrared lens should be specially designed according to its working band to optimize performance. The infrared data used by infrared lenses for different wave bands are also different.
Vignetting
The lens forms an image to fill the infrared detector. In general, the focal plane of the infrared detector is a rectangle or a square, while the image formed by the infrared lens is a rotationally symmetrical circular area. The lens must create a diagonal at the detector focal plane that is equal to or larger in diameter than the focal plane array. If the image does not completely fill the detector area, the resulting effect is called vignetting, which incurs a reduction in energy at the edges of the field of view in the image.
Focal Length and Field of View
Infrared lenses are usually identified by their focal length. As the focal length increases, the field of view of the lens narrows (Narrow). Conversely, as the focal length decreases, the field of view becomes wider (Wide).
Infrared lenses can generally be divided into single-field lenses, multi-field lenses, and continuous zoom lenses. Because the infrared continuous zoom lens can complete the search for the target and the continuous tracking of the target at different distances, it is widely used in many fields.
F number
The F number of the infrared lens determines how much of the target radiant energy enters the infrared camera. The smaller the F-number, the larger the size of the infrared lens at the same focal length, and when used with the corresponding detector, the more infrared radiation will be obtained, and the higher the flexibility of the thermal imaging camera will be.
Depth of field
Depth of field is the range of the furthest distance and the closest distance that the lens can see clearly without focusing. The depth of field is not only related to the focal length of the lens, F number, imaging quality and its set alignment imaging distance, but also related to the pixel size of the detector. Generally speaking, the larger the F number, the shorter the focal length, and the larger the pixel size of the detector, the larger the depth of field. With respect to different alignment planes, the range of depth of field is also different.
Applications of infrared lenses include:
Airborne (UAV)
Security and Surveillance
Maritme and Naval Surveillance
Thermal Imaging Devices
Defense
Thermography
Enhanced Vision
LWIR Uncooled Continuous Zoom Lens Parameters
| Product Name | Uncooled Continuous ZOOM Lens |
| Focal Length | 25-75mm |
| F# | 1.0-1.2 |
| Detector | 1024x768-14um |
| Wavelength | 8um-12um |
| Circular FOV | 32°x24.27°~10.92°x8.2° |
| Focus Type | Motorized Adjustable |
| Weight | ≤1.3kg |
| Operating Temperature | -40℃~+60℃ |
| External Coating | DLC |
| Focus motor type and power supply | DC, 12V |
| Zoom motor type and power supply | DC, 12V |
Contact us to get the latest discounts on zoom lenses:
Email: alwson@risingoptics.com
Whatsapp: +86 13952018524
Company Profile:
LWIR Uncooled Continuous Zoom Lens Process Equipment:
1. Inner carving test platform;
2. Microscope;
3. Opto Tech aspheric processing;
4. Polishing machine;
5. Thickness Gauge;
6. Ultrasonic Cleaner;
7. Workshop;
8. Interferometer;
9. High and low tempera ture test chamber;
10. High polishing machine;
11. Optical bench;
12. Raul milling;
13. Atomic force microscope;
14. Centralinstrument;
15. Hand Grinding and Polishing Machine;
FAQ:
Q1: Do you provide samples? Is it free or extra?
A: We will charge as little sample fee as possible, and sometimes we may even provide samples for free. However, you must pay us the courier fee by the following courier methods: DHL, TNT, UPS and FEDEX.
Q2: What if the item is broken?
A: Except for human error, we will replace the defect in a completely new way Within 7 days after you get our products.
