How can an inexpensive NeutronOptics Camera compete with more expensive detectors?
All cameras can be supplied with either high efficiency x-ray or neutron scintillators.
Smaller cameras (V4) are constructed from cast and machined aluminium boxes. Larger cameras (V5) are constructed from laser cut and welded aluminium boxes. Aluminium screws are used for parts close to the neutron beam to reduce activation.
For current prices, please see the NeutronOptics price list. Cameras are delivered with everything necessary for use with any TV monitor or PC, including cables and software.
Choice of CCD and Lens for Different ApplicationsOur cameras can be supplied with a choice of 16-bit digital CCDs instead of the original "video" CCD. Our 752x580 or 1392x1040 pixel slim CCD and compact f/1.0 CS-mount lens (left) is designed for fast imaging with our small cameras. It has the same efficiency and resolution as the video CCD, but with 16-bit output. At the other extreme, our 4008x2672 pixel full-frame 35mm CCD and Nikkor f/1.2 F-mount lens (right) is designed for high resolution imaging. In between, we offer a high resolution CCD option, with a large C-mount lens (center). (Images are not to scale).
Want to use your own CCD ? No problem.If you already have a CCD unit we can build a camera box for it to your own specifications, with or without scintillators and lenses. Our custom laser cut and welded aluminium boxes with B4C light-tight baffles and aluminium screws can be provided with a choice of front-end path lengths to suit the size of your CCD and the focal length of your lens. You simply bolt your CCD to the end of the main box, and swap front-ends and/or lenses to change your Field-of-View and resolution.
The mini-iCam 36 mm neutron or x-ray camera
The mini i-Cam is our smallest (and cheapest) x-ray or neutron camera, and also uses our slim USB CCD. It is intended for the alignment of small beams and samples, for example, behind our backscattering Laue camera. It is powered by the USB2 data cable, so is very simple to set up and use.
The i-Cam is only ~160mm long and has 580 or 1040 pixel resolution over an area of 36mm diameter, so with its efficient f/1.0 lens it is also very bright. The scintillator and carbon fibre window can easily be exchanged, depending on whether x-rays or neutrons are to be imaged. A Pb-glass plate protects the CCD from radiation damage.
The mini-iCam can otherwise be supplied with a 90-degree mirror in front of the lens, with the camera perpendicular to the beam, so the Pb-glass plate is no longer needed. The in-beam length is then only 50mm for an image of 35mm diameter through the carbon fibre window. Details may differ slightly from the photo opposite.
The compact 75x50 mm neutron or x-ray cameraCamera efficiency is proportional to the area of the CCD divided by the imaging area, so our compact 75x50mm camera is also very efficient, again using our slim USB CCD. These small cameras require only the supplied 10m amplified USB cable for power and data acquisition.
- Sensor Type: Sony EXView ICX829ALA or ICX825ALA
- Image size: Diagonal 8 mm (1/2") or 11 mm (2/3")
- Resolution: 752x580 or 1392x1040 pixels
- Pixel Size: 8.6 x 8.3 µM or 6.45 x 6.45 µM
- Binning: 2x2 to 8x8 (improved intensity & read-out )
- High Efficiency: (QE>75% at 500-600nm), low smear
- Low dark current: (<0.1 e.s ambient), anti-blooming
- Full Well Capacity: >50,000 electrons (dynamic range)
- ADC: 16 bit grey scale, optional filtering and distortion
- Maximum Exposure Length: Unlimited
- Readout Noise: 10 e- typical value (0ºC)
- Readout Time: Typically 0.2 sec for full frame via USB2
- Interface: USB 2.0 High Speed with 10-20m USB cables
- Power: USB powered, No cooling
- CCD Unit: 32mm diameter, 72mm height, 50g weight
- SDK: C++, VB Wrapper, .net Wrapper, ImageJ, LabView
The slim 100x50 mm neutron or x-ray cameraOur popular slim camera is only 44mm thick for a sensitive area of 100x50mm in a 120x120mm box, using our slim USB CCD. It can fit into the small space between the sample environment and the beam stop, and no power is required except for a single 10m USB2 cable for image acquisition. With such a compact camera, a correction may be required for slight barrel distortion.
A larger 100x60mm FOV can be obtained with a 55mm thick box, or a smaller, brighter 75x50mm FOV can be provided with our compact camera. A longer version can also be supplied to eliminate slight barrel distortion.
If required, the digital CCD can be replaced by a video CCD for real-time imaging.
The thin carbon fibre windows used for the x-ray version (left) are much stronger than mylar or aluminium foil, yet are >70% transparent, even for CuKα X-rays (8 KeV).
A choice of x-ray scintillator is available with a thinner scintillator for higher resolution
(~100µ) and a thicker scintillator for higher efficiency, especially for harder x-rays, yet still good resolution (~150µ).
The improved 100x100mm and 125x125mm cameras
Our new 100x100mm V4. camera is an improvement on the earlier version. In a 165x127x77mm aluminium box it is significantly thinner than our old 100mm camera. It is shown here with our standard slim CCD, but can also be supplied with higher resolution CCDs.
A larger 125x125mm version can be supplied in a 222x146x105mm aluminium box. Again optional high resolution, cooled CCDs can be used.
Other simple custom cameras can be supplied in larger aluminium boxes, such as our 150x120mm camera in a 195x230x100mm box, or our 200x150mm and 250x200mm cameras, but for serious imaging one of our advanced L-shaped cameras with a high resolution cooled CCD is preferable.
Of special interest is our simple 200x100mm camera designed for checking the uniformity of neutron beams transmitted by guides. It is housed in a 250x250mm aluminium box only 75mm thick. The FOV can be increased to 200x125mm using a 100mm thick box (photo below - click to enlarge).
Advanced neutron or x-ray imaging cameraNeutronOptics won a contract from an international agency to build an advanced neutron imaging camera for a medium flux reactor. This 200x200mm camera uses high resolution PSI-TriTec Swiss scintillators and front-surfaced mirrors with Nikkor f/1.2 50mm optics feeding a high resolution 16-bit cooled camera (Kodak KAI-4022 CCD) with 2048 x 2048 pixel resolution and low noise
( click photo for details).
The periscope-shaped camera removes the expensive CCD unit far from the neutron beam. The front-end is interchangeable to allow a choice of image area of 200x200mm or 100x100mm at higher resolution (limited by beam collimation & scintillator choice).
The aluminium neutron scintillator plate shown can also be replaced by a thin carbon fibre plate with an X-ray scintillator. So the same imaging camera can be used for both X-rays and neutrons.
Alternative CCDs and lenses can be used, providing higher resolution in a 100x100mm compact imagingcamera. If faster readout is required, the 2048x2048 CCD unit can be replaced by a 2048x2048 sCMOS detector.
These cameras rival the performance of those in leading European laboratories, who advised on their design.
Please see the detailed specifications with the manual for this camera.
Fast 250x200mm X-ray or Neutron Imaging CameraOur latest camera has exceptionally low noise, high resolution and fast readout over large areas. We use the new 1 inch Sony ICX694ALG EXview HAD CCD II to give a resolution of 2750x2200 pixels over an area of 250x200mm (90 µm resolution). Dark current is virtually eliminated by thermo-electric cooling by -35C, and high speed readout noise is low. The total noise count in 300s over 6 million pixels is only ~2000 counts, and that can be reduced to ~500 with the isolated hot pixel filter of imageJ. That is amazingly low, resulting in exceptional dynamic range. The 180mm long front section can easily be removed to change between different neutron and x-ray scintillators. (Detailed Manual)
- Sensor: 1" Sony EXview HAD CCD II
- Optics: High resolution f/1.4 1" lens
- Resolution: 2750 x 2200 pixels
- High sensitivity: (QE~75%), low smear
- Dark current: 0.002 e/pix/s @-10 °C
- Cooling: Regulated Peltier ΔT = -35°C
- Digital Output: 16-bit 65536 levels
- Readout Speed: 6-12 MPixels/s
- Binning and Region-of-Interest
- External Trigger: GPIO synchronisation
- SDK: C++, VB, .net, ImageJ, LabView
(Click on the photos to enlarge them)
Other CCD units and lenses can be used with this camera box, by simply changing the length of the front-end section to obtain the desired Field-of-View. For example the Nikkor 50mm f/1.2 lens can be used with the 4/3" 2048x2048 pixel KAI04022 CCD, or the very large 35mm 4008x2672 pixel KAI11002 CCD for highest efficiency and resolution.
Big 400x300mm X-ray or Neutron Imaging CameraOur biggest camera to date uses the full-frame 35mm Kodak KAI11002 interline CCD with 4008x2672 pixels giving a resolution of ~100 µm over an area of 400x300mm. As usual, the scintillator is in the 200mm interchangeable front section, and the main camera body can accommodate other CCD units and lenses, with the length of the front section adjusted to obtain the desired Field-of-View with the chosen CCD chip dimensions.
- Sensor: 35mm Kodak KAI11002
- Optics: Nikkor f/1.2 50mm lens
- Resolution: 4008 x 2672 pixels
- High sensitivity: (QE~50%)
- Dark current: <0.03 at -20 °C
- Cooling: Regulated ΔT = -38°C
- Digital Output: 16-bit 65536 levels
- Readout Speed: 1 MPixels/s
- Binning and Region-of-Interest
- Software Trigger
- SDK: C++, VB, .net, ImageJ, LabView
Click the photos to enlarge them.
Note the pencil for scale.
Laue crystal alignment camerasWe have developed various Laue crystal alignment cameras for x-rays to replace the old Polaroid Laue camera, and similar cameras might be used with a neutron beam. A finely collimated white beam produces a number of "Bragg spots" from a single crystal, and by measuring the positions of these spots the crystal orientation can be determined. Greater precision is obtained with backscattering, but the intensities are much weaker, especially for x-rays because of the scattering "form-factor".
We have recently developed this single CCD backscattering camera, where a fine collimator in the back of the camera directs the beam through a small hole in a mirror and out through the front carbon fibre window. The backscattered diffraction pattern from a single crystal a few cm in front of the window is captured on a scintillator behind the window, and this pattern is reflected by the mirror to the lens-coupled CCD on top.
Options for video CCD neutron or x-ray cameras
All of the older video CCD cameras can be equipped with various options to improve performance or ease of operation. For example, the photo on the left shows the 100x60 mm camera fitted with a Peltier cooler and fan to reduce thermal noise for longer exposures, plus a miniature wireless receiver to allow remote control.
A small wireless video transmitter (blue) and receiver is shown alongside the camera.
This transmitter operates on 16-channels near 1.2 GHz
or 12-channels near 2.4GHz at 700 mW. Lower power transmitters are also available if required to satisfy local regulations.
The wireless channel can be changed at the press of a button, and additional transmitters or receivers can be purchased separately.
Before ordering, please check the radio frequencies and power permitted in your environment.
High Efficiency Photonic Science neutron cameras
CYCLOPS is the latest and largest PhotonicScience neutron camera constructed for ILL. It consists of 16 image-intensified Peltier-cooled CCDs scanning an octagonal scintillator to cover almost complete 4π scattering in real time. Total readout time is only ~1 sec for the complete 7680x2400 array of 170µ pixels as an 8, 12 or 16-bit TIF image. A complete diffraction pattern can be obtained in only a few seconds, making it possible to follow changes in crystal structure as a function of temperature, pressure or magnetic field. Here is a short streaming video illustrating the astonishing power of such a machine, even if at present it is located on a low-flux guide with a 107.n.cm-2.sec-1 white thermal beam.
All these cameras use a white neutron beam, and will work on either reactor or spallation neutron sources.
For further details of their application and availability, please contact