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Scientifica Multiphoton Detection Unit XL (MDU XL)
Scientifica's MDU XL is a multiphoton detection unit with increased sensitivity, designed to achieve a superior signal-to-noise ratio and improved image quality, translating to crisper and deeper images.
The MDU XL offers up to 35% more efficient light collection in multiphoton imaging experiments for up to two colours when compared to the standard MDU.
Optimised for use with a range of large back aperture objectives, meaning the MDU XL enables collection of more scattered light for deeper tissue structures compared to the standard MDU.
The MDU XL can be fitted with two photomultiplier tubes (PMTs) for photon collection from two channels simultaneously.
Available with up to two gated or protected GaAsP PMTs for maximum sensitivity.
Customer acquired data Expand
Data kindly acquired and provided by Dr. Tobias Ackels, the Francis Crick Institute
Layer V pyramidal neurons in the visual cortex expressing GCaMP6s, in vivo. The laser power was kept at a constant power level while increasing the imaging depth.
NOTE: fluctuations in intensity within a structure are caused by calcium transients during the image stack acquisition.
Design & Specifications
Collection OpticsPrimary Detection Dichroic: 60 x 40 x 1
|Collection lens diameter: 45 mm|
|Maximum collection angle: ~±8° assuming 20mm objective back aperture|
|IR Blocking Filter: 680nm Shortpass 50mm Ø|
Emission FiltersEmission filter: 32mm Ø - one for each detector
|Short wavelength perpendicular to the incident light, longer wavelength on the incident direction|
|Blocking filter: 32mm Ø for stimulation wavelength|
Photomultiplier TubesTwo locally mounted detectors of the same type: GaAsP protected photomultiplier tube (H10770PA-40) or GaAsP photomultiplier tube with gating function (H11706P-40)
|Signal output Connector: SMA|
|Gate input connector (gated GaAsP only): BNC|
Protection CircuitryProtected GaASP: Integrated protection circuitry to trip PMT when overload detected
|Gated GaAsP: Voltage gating functionality to avoid overload situations|
|All systems: Ambient light detector|
|Objective and Nosepiece Compatibility||
Objective and Nosepiece CompatibilityObjectives: M32, M27, M25, RMS threaded objectives (<20mm back aperture)
|Nosepieces: Ships with single objective changer with 2 locking sliders|
|Compatible with: WI-SRE3 adapter (RMS only) or standard/DIC objective sliders|
Preamplifier BandwidthOptions include: 20 MHz (resonant system), 1 MHz (galvo), or variable bandwidth all with low noise linear power supply
|PMT Voltage Control||
PMT Voltage ControlManual or software control
PMT ProtectionIntegrated protection circuitry in H10771P-40 only. For all PMT options, a remote ambient light sensor is used