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Confocal Microscope System

Available in Europe/Africa only

Equipped with a galvano scanner for high-resolution, A1+ dramatically improves confocal performance and ease of operation.

Nikon confocal microscope system A1+ provides high-resolution imaging of up to 4096 x 4096 pixels with a galvano (non-resonant) scanner. With diverse innovative optical and electronic technologies, superior image quality has been achieved.

Key Features

High-resolution imaging with a galvano scanner


The A1+'s galvano scanner enables high-resolution imaging of up to 4096 x 4096 pixels. In addition, with its scanner driving and sampling systems, plus image correction technology, high-speed acquisition of 10 fps (512 x 512 pixels) is also possible.


Image of a zebrafish labeled with four probes (captured with galvano scanner) 
Nucleus (blue): Hoechst33342, Pupil (green): GFP, Nerve (yellow): Alexa Fluor® 555, Muscle (red): Alexa Fluor® 647 
Photographed with the cooperation of: Dr. Kazuki Horikawa and Prof. Takeharu Nagai, Research Institute for Electronic Science, Hokkaido University

Increased light detection efficiency realizes high image quality


The low-angle incidence method utilized on the dichroic mirrors increases fluorescence efficiency by 30%.


By employing the hexagonal pinhole, higher brightness equivalent to that of a circular pinhole is achieved.

Nikon's original dual integration signal processing technology (DISP) has been implemented in the image processing circuitry to improve electrical efficiency, resulting in an extremely high S/N ratio.

Fast and accurate spectral imaging: A1-DUS Spectral Detector Unit

High-speed spectral imaging

Acquisition of a 32-channel spectral image (512 x 512 pixels) with a single scan in 0.6 second is possible. Moreover, 512 x 32-pixel images can be captured at 24 fps.

Accurate, high-speed unmixing


Accurate spectral unmixing provides maximum performance in the separation of closely overlapping fluorescence spectra and the elimination of autofluorescence. Superior algorithms and high-speed data processing enable real time unmixing during image acquisition.


Actin of HeLa cell expressing H2B-YFP was stained with Phalloidin-Alexa Fluor® 488. 
Spectral image in the 500-692 nm range captured with 488 nm laser excitation 
Left: Spectral image, Right: Unmixed image (green: Alexa Fluor® 488, red: YFP) 
Specimen courtesy of: Dr. Yoshihiro Yoneda and Dr. Takuya Saiwaki, Faculty of Medicine, Osaka University

Wide band spectral imaging

Simultaneous excitation with four lasers selected from a maximum of eight wavelengths is available, enabling spectral imaging across wider bands.

V-filtering function

Filter-less intensity adjustment is possible by selecting desired spectral ranges from 32 channels that match the spectrum of the fluorescence probe in use and combining them to perform the filtering function.


Bright spectral imaging: A1-DUVB GaAsP Detector Unit

High-sensitivity spectral image acquisition

With a GaAsP PMT, the A1-DUVB tunable emission detector delivers flexible detection of fluorescent signals with higher sensitivity, in both the galvano and resonant imaging modalities.

Variable acquisition wavelength range

User-defined emission bands can collect images within a selected wavelength range, replacing the need for fixed bandwidth emission filters. 
Users can define the emission bandwidth range to as little as 10nm. Spectral images of multi-labeled specimens can be acquired by capturing a series of spectral images while changing detection wavelengths.

Based on the application, virtual bandpass mode and continuous bandpass modalities are selectable on the A1-DUVB.


VB (Variable Bandpass) mode


VB (Variable Bandpass) mode allows maximum 5ch color image


Unmixed Image CB (Continuous Bandpass) mode


CB (Continuous Bandpass) mode allows maximum 32 ch spectrum imaging

HeLa cells labeled with five-color fluorescence, Nucleus: DAPI, Vimentin: Alexa Fluor® 488, Lamin: Alexa Fluor® 568, Tubulin: Alexa Fluor® 594, Actin: Alexa Fluor® 633 
Specimen courtesy of: Dr. Tadashi Karashima, Department of Dermatology, Kurume University School of Medicine

Optional second channel detector

An optional second GaAsP PMT provides flexibility in detection. Users can divert selected wavelengths to the second fixed bandwidth emission channel by inserting a dichroic mirror, while simultaneously utilizing the user-definable emission band on the first channel. The second detector allows FRET, ratio imaging and other applications requiring simultaneous multi-channel imaging.

Accurate spectral unmixing

Multi-channel images acquired with the A1-DUVB can be spectrally unmixed by using the spectra of reference samples, or the spectra within the acquired images.

Simple operation of complex applications

NIS-Elements C control software enables integrated control of the confocal imaging system, microscope and peripheral devices with a simple and intuitive interface. Diverse reliable analysis functions are also available.


Basic operation


Optical setting


Configuration of A1+ with N-SIM

System integration of Ti2-E inverted microscope for multi-mode imaging is possible by equipping the confocal microscope system with N-SIM/N-STORM super resolution microscope system, TIRF system, spectral detector and Perfect Focus System. All systems can be controlled by a single NIS-Elements platform.

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