Description
Product Introduction
In many imaging systems, image intensifiers are a core component. Examples include imaging in extremely low-light environments, fast event imaging that requires ultra-short exposure times, or imaging in the ultraviolet spectrum that is not sensitive to conventional CCD or CMOS cameras. Our RapidIntense image intensifiers are designed to enhance imaging capabilities in these applications and meet a wide range of technical needs.
The RapidIntense family of image intensifiers uses a state-of-the-art deposition process and is packaged in a vacuum environment to meet the needs of a wide range of applications. As an imaging component of the camera, this series of products is used to amplify weak light or ultraviolet light at the front end of the camera and convert it into visible light to meet the imaging needs of different cameras and applications.
The RapidIntense-H can be used for camera imaging at frame rates up to approx. 200 Hz. It has a second- or third-generation photocathode, single-layer MCP, and P43 phosphorescent screen to meet the needs of medium and low frequency imaging. Typical application areas include LII, LIF, etc.
RapidIntense-K can be used for high-speed or ultra-high-speed camera imaging at up to MHz frame rates. It has a second- or third-generation photocathode, single-layer MCP, P46 phosphorescent screen to meet the needs of high-speed imaging. Typical application areas include 10kHz PLIF, 500kHz PLIF, or chemical autofluorescence imaging.
The RapidIntense-H image intensifier is used with the RapidImage MAX ultra-large format high-sensitivity camera for PLIF imaging
Alcohol blowtorch OH-PLIF results
Light cathode
The RapidIntense series of image intensifiers can choose between the second or third generation of photocathodes to meet the needs of image enhancement from ultraviolet to visible light. The whole series of products is equipped with high-speed gating as standard, which can achieve a minimum door width of about 5ns.
In engineering applications, oil-rich combustion inevitably produces a large amount of soot, and the short gate width and precise delay control can ensure a pure fluorescence signal with the highest signal-to-noise ratio.
By shortening the exposure time from 10ms to 100us, a clear OH chemifluorescence flame structure can be obtained. PLIFs, on the other hand, often need to have a gate width of less than nanoseconds to reduce flame background noise
Anode – phosphorescent screen
Different imaging frame rate requirements determine the material of phosphorescent screen: P43 phosphorescent screen has extremely high brightness and an attenuation time of about 5ms (100%-10%), which is suitable for ultraviolet gated imaging and image enhancement with medium and low frame rate cameras; The P46 phosphorescent screen has an attenuation time of about 500ns (100%-10%), which is suitable for imaging needs up to MHz.
Gain
We have a single-layer MCP as standard in our H series to generate image gain. Single-layer MCP can produce about 103~104 times gain, combined with high-performance photocathode and optimized low-noise phosphorescent screen, which can meet the imaging needs of medium and low-speed fluorescence measurement.
The K series is aimed at very high-speed imaging applications, which often mean weaker fluorescence intensities or shorter exposure times, and the luminous efficiency of the P46 phosphorescent screen is lower than that of the P43, so the single-layer MCP cannot produce the desired image gain.
Different from the conventional double-layer MCP solution, the RapidIntense-K series products adopt a two-stage enhancement product design: the two-stage enhancement can effectively improve the self-excited noise caused by the double-layer MCP at high gain, and meet the application scenarios with high requirements for light intensity linearity such as PLIF. Two-stage enhancement can also significantly improve the output image resolution to meet the needs of high-resolution imaging.
The rapidintens controls the software interface
Relay mirror
The relay mirrors of the RapidIntense series offer extremely high optical coupling performance with an optimized balance of optical resolution and clear aperture. In the H series, due to the different sensor sizes on the camera side, we use a relay mirror in the form of a tandem lens set to easily change the relay ratio according to the user’s camera sensor size, so as to obtain the highest image resolution; In the K series, we are equipped with a 1:1 relay mirror as standard to meet the needs of high-speed camera sensors with large formats.
Field of view coverage and output resolution of different target cameras
Synchronisation Control
RapidIntense offers complete system control of PLIF and supports a wide range of synchronisation methods, allowing users to implement complete measurements without the need for additional synchronisation controllers.
RapidIntense meets the timing requirements of a complete PLIF
Door width control
High-precision door width control is the core function of the image intensifier. RapidIntense provides functions such as internal trigger + door width control, external trigger + door width control, and pass-through gating.
When the gating is triggered internally, we take the rising edge of the actual gate as the T0 time, and we can control the falling edge of the gate and the signal pulse width and delay of the three programmable TTL signal outputs respectively.
In the case of external trigger gating, RapidIntense can be gated by an external trigger signal, where the level width of the external trigger signal determines the gate width.
Technical Specifications
RapidIntense – H/K
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