This article focuses onHigh speed shortwave infrared cameraIn practical applications, high-frequency problems cover core scenarios such as imaging effects, operation and use, maintenance and compatibility, providing targeted solutions to assist in the efficient use of equipment.

1、 Imaging effect related issues

1. Is the imaging image blurry and unable to capture high-speed target details clearly?

Core reasons: frame rate mismatch with target motion speed, improper lens adaptation, or inaccurate focusing.

Solution: ① Confirm that the camera frame rate is ≥ 5 times the target motion speed (if shooting an object moving at 100m per second, it is recommended to have a frame rate of not less than 500fps), and turn on the high-speed shutter mode to reduce ghosting; ② Choose short wave infrared specialized lenses that match the camera resolution, and prioritize fixed focal length lenses for industrial inspection scenarios to improve focusing accuracy; ③ If it is dynamic focusing, enable the camera's autofocus tracking function, or lock the detection target through software preset focus area.

2. Is there obvious noise or overexposure in the image, with severe loss of details?

Core reasons: mismatched light sources, improper exposure parameter settings, or environmental interference.

Solution: ① Use a dedicated short wave infrared LED light source that matches the working wavelength of the camera (1.0 μ m-3.0 μ m), and select a coaxial light source for penetration detection scenes to avoid interference from visible light sources; ② Adjust the exposure parameters and increase the ISO sensitivity appropriately during high-speed shooting, but not exceeding 1.2 times the camera's rated value. At the same time, shorten the exposure time to within 10 μ s to avoid overexposure; ③ Stay away from strong infrared radiation sources such as high-temperature equipment, and use lenses with anti fog coatings for outdoor use to reduce environmental radiation interference.

2、 Operational usage issues

1. Frequent data transmission interruptions or lagging during high-speed shooting?

Core reasons: insufficient interface bandwidth, unstable power supply, or software compatibility issues.

Solution: ① Priority should be given to using GigE Vision or USB3 Vision high-speed interfaces to ensure that the length of the transmission cable does not exceed the rated distance of the interface (GigE Vision recommends ≤ 100m), avoiding cable switching; ② Using an independent regulated power supply, the input voltage is stable between 11.5V-13V to avoid sharing power with other high-power devices; ③ Upgrade to the machine vision software recommended by the camera official (such as Halcon, LabVIEW), disable the software backend redundancy function, and ensure that the software matches the camera firmware version.

2. Unable to accurately control the shooting timing in external trigger mode?

Core reason: Trigger mode setting error or signal phase mismatch.

Solution: If precise control of exposure time is required, select the "hardware external trigger+software set exposure time" mode, set the trigger signal phase to rising edge in the advanced control tool, preset the exposure time (such as 50ms), and input 1ms for a brief high-level trigger; ② If dynamic adjustment of exposure time is required, select the "hardware external trigger+pulse width controlled exposure" mode to ensure that the duration of the high-level trigger signal is consistent with the required exposure time; ③ Check the trigger cable connection to ensure good contact of the optocoupler isolation port and avoid signal delay caused by electromagnetic interference.

3、 Maintenance and upkeep related issues

Is the imaging still affected even after cleaning if there are stains on the surface of the lens or sensor?

Core reasons: Improper cleaning methods may damage the anti reflective coating, or moisture and fog may accumulate inside the sensor chamber.

Solution: ① When cleaning the lens, use specialized dust-free lens paper dipped in short wave infrared camera specific cleaning agent and gently wipe it in a clockwise direction. Do not touch the lens with ordinary paper towels or alcohol (which will corrode the anti reflective coating); ② When there is dust on the surface of the sensor, use specialized dust-free air to blow vertically and avoid contact with the sensor surface; ③ If fog forms inside the sensor chamber, connect a silicone tube through the camera drying hole to introduce dry gas, or turn on the built-in heating plate (temperature set at 65-70 ℃) to drive moisture. When using outdoors, avoid placing the camera facing downwards.

2. Does the cooling effect of a refrigerated camera decrease, affecting long-term high-speed shooting?

Core reason: Thermal shock damage or poor heat dissipation of the refrigerator.

Solution: ① To avoid sudden opening and closing of the refrigerator, gradually increase the power when it is turned on (it is recommended to increase it to the target power in 3 times), and gradually reduce the power to the lowest value before turning off the power; ② Check the heat dissipation module. In industrial high-temperature scenarios (>60 ℃), an external heat dissipation fan or water cooling device should be installed to ensure that the camera's operating temperature is within the range of -10 ℃ -70 ℃; ③ Regularly clean the dust on the cooling fins of the refrigerator to ensure smooth cooling channels, and calibrate the cooling temperature accuracy once a month.

4、 Other key issues

How to determine if the camera is suitable for my detection scenario?

Solution: ① Industrial defect detection: Choose InGaAs sensor camera, resolution ≥ 1920 × 1080, minimum defect recognition ability ≤ 0.1mm, wavelength matching detection material (such as silicon material, choose 1.5 μ m-2.5 μ m); ② High speed dynamic monitoring: Focus on frame rate (≥ 30fps) and shutter speed (≤ 10 μ s), choose low light models (≤ 0.01lux@2.0 μ m) paired with a telephoto lens (50mm-200mm); ③ Outdoor scene: Select models with a protection level of IP65 or above, with anti fog coating on the lens and support for wide temperature operation.

What should I do if the USB port is damaged or the connection is unstable while using the camera?

Core reason: Poor grounding leads to leakage shock.

Solution: ① Ensure that the computer, power adapter, and camera are grounded together, and use a multimeter to detect the voltage between the USB metal casing and the negative pole of the power adapter, ensuring that the voltage is ≤ 0.5V; ② If natural grounding cannot be achieved, connect the computer metal casing and the negative pole of the power adapter directly with a wire; ③ Replace the qualified 220V to 12V adapter to avoid leakage and damage to the port caused by inferior adapters. Power off the power before plugging in and unplugging the USB cable during daily operation.