HiCATT Specification
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High-speed intensified Camera Attachment The hybrid Image Intensifier of the HiCATT consists of 2 stages and can be delivered with a diameter of either 25 mm or 18 mm. The first stage is a Gen II or Gen III proximity-focused MCP intensifier and offers a very high, adjustable gain. The second stage is a proximity-focussed Gen1 booster, producing the extra high output brightness required for imaging at high frame rates. In its gating mode the first stage functions as a fast electro-optical shutter with effective exposure times down to the nanosecond regime. The intensifier can be operated at repetition rates of up to 2.5 MHz in burst. The HiCATT is an intensified camera attachment specifically designed for use in combination with high-speed cameras. It can be used to amplify low light level images to a level up to 10000 times, thereby boosting the sensitivity of the attached high-speed camera and enabling high-speed, low light-level imaging. The HiCATT attaches to all major brand high-speed cameras by using a high-quality lens coupling. With a wide range of Gen II and Gen III image intensifiers the HiCATT offers high sensitivity down to single photon level and the optimal spectral bandwidth for your application. Different models covering a range in spectral sensitivity, phosphor, spatial resolution, gain, linearity, minimum gate width and gating frequency are available. A series of different intensifier control units provide functionality ranging from analog gain control to full digital control including an internal trigger generator and programmable gate trains. Standard, the first stage image intensifier of the HiCATT is equipped with a single MCP. Dual MCP image intensifiers are available on request. Easy coupling Flexible and efficient lens coupling to all major brand high-speed cameras (up to 300 000 fps) Particle Image Velocimetry (PIV) High resolution image intensifiers Gen II and Gen III image intensifiers offering the world’s highest resolution and sensitivity in the UV, visible or near infrared Small gate widths Gate width down to les than 3 ns (FWHM) with minimal jitter High gate repetition rates Up to 300 kHz / 2.5 MHz burst Laser Induced Fluorescence (LIF) Single photon imaging Bio- and Chemiluminescence Imaging Plasma physics Astronomy Time-resolved imaging and spectroscopy Compact design For an easy fit to your imaging or spectroscopy setup Overexposure protection User-definable anode current limitation Specifications are subject to change without prior notice.

Image Intensifier Layout b c a) light b) image intensifier c) booster d) relay lens e) camera f) gate unit g) MCP power supply h) gate input (TTL) When the HiCATT is mounted to a lens or microscope, the incoming light (a) is focused onto the entrance window of the image intensifier (b). The image intensifier converts the optical image to electrons at the photocathode, amplifies this electron image at the micro-channel plate (MCP), and re-converts the electrons into photons at the anode screen. The second image intensifier (booster, c) further amplifies the signal. At the output of the...

Spectral response and phosphor decay time Phosphor Efficiency Intensifier working principle FIRST STAGE SECOND STAGE On the photocathode(l) photons get converted into electrons. These are accelerated in an electric field towards the Multi Channel Plate (MCP, 2) and hit the channel walls. Depending on the voltage across the channel, multiple electrons are generated by secondary emission. This cloud of electrons gets accelerated towards the anode screen (3), where the elec- trons are converted back into photons by the phosphor layer. These photons are guided by a fiberoptic faceplate (3) to...

Gating The HiCATT can be used as an ultra-fast electro-optical shutter by gating the image intensifier. This eliminates motion blur and reduces the effective exposure time, thereby significantly widening the camera’s dynamic range. To prevent loss of intrascene dynamic range when using a shorter gate the user can set a higher MCP gain. The pulse width and frequency are user defined: any pulse width from DC down to a few nanoseconds can be applied. The table below summarizes the range of different intensifier control units available for the HiCATT. • • • The gain control models act as a...

manual gain manual gain ] Shutter (optional) High speed External gate delay generator gain control Shutter (optional) gain control High speed External gate delay generator gate control Shutter (optional) gate control / ! Control Gate High speed trigger source, * The intensifier gate generator can also operate as master trigger source for camera, intensifier and other devices. Shutter output is only available on intensifier gate generator.

Dimensions and operating conditions HiCATT 25 with 1:1 relay lens Supply voltage Operating temperature Operating 20% - 80% humidity (non-condensing) Weight HiCATT 25 with 2:1 relay lens Supply voltage Operating temperature Operating 20% - 80% humidity (non-condensing) Weight HiCATT 18 with 1:1 relay lens Supply voltage Operating temperature Operating 20% - 80% humidity (non-condensing) Weight 6

Gain control IC-DG-USB Gate generator / P IC-GG-USB / IC-PG-USB Gate control IC-GC-USB 157 x 198 x 72 Weight Working Voltage Power Fused Entrée Mechanical shutter The HiCATT can be supplied with an optional mechanical shutter for preventing damage to the image intensifier by high intensity stray light or direct laser light. It is further recommended to close the shutter between measurements to increase the lifespan of the image intensifier. The shutter replaces the original F-mount adapter of the HiCATT. The back focal distance of the F-mount input is unchanged so any F-mount objective can...

1a. Recording a blue gas flame from a Bunsen burner at high frame rates poses a challenge. The light intensity of the flame is low and to be able to see any details, especially in close-ups, very short exposure times are required. 1b. Recording made with a standard high-speed camera at 1000 fps and 1 ms exposure time. On the one hand, a long exposure time is needed to increase the sensitivity of the camera. On the other hand, a short exposure time is necessary to prevent motion blur. 1c. Recording made with the HiCATT in front of the high-speed camera at 2000 fps and 15 µs exposure time...