Nikon ECLIPSE Si Upright Clinical and Educational Biological Microscope

Overview

The Nikon ECLIPSE Si is an upright biological microscope engineered for rigorous clinical diagnostics, undergraduate and graduate life science education, and routine histopathological examination. Designed around Nikon’s industry-standard CFI60 infinity-corrected optical system, the ECLIPSE Si delivers high-contrast, color-accurate imaging across wide-field and high-magnification objectives (up to 100× oil immersion). Its optical architecture minimizes chromatic and spherical aberrations while ensuring consistent resolution and flatness of field—critical for reliable morphological assessment of stained tissue sections, blood smears, and cultured cells. The instrument operates on a stable, vibration-damped mechanical platform with a rigid cast-aluminum frame, supporting long-term use in teaching laboratories and clinical support environments where reproducibility and operator ergonomics are essential.

Key Features

• CFI60 infinity-corrected optical pathway ensures compatibility with Nikon’s full range of plan apochromat and plan fluor objectives, enabling seamless integration with future digital imaging upgrades.
• High-efficiency white LED illumination provides stable, flicker-free output with a correlated color temperature of ~5,800 K—optimized for brightfield, phase contrast, and optional polarized light applications without thermal drift or bulb replacement cycles.
• Integrated Köhler illumination via fly’s eye lens guarantees uniform brightness across the entire field of view, even at high magnifications, reducing observer fatigue during extended sessions.
• Coaxial dual-side focus controls feature precision-ground cross-roller guide rails for smooth, backlash-free movement; coarse focus travel spans 37.7 mm per revolution with torque-adjustable tension ring to accommodate varying user preferences and training requirements.
• Fine focus mechanism offers 0.2 mm per revolution with 2 µm minimum graduation—sufficient resolution for accurate focusing on subcellular structures such as nucleoli, mitotic spindles, or bacterial morphology.
• Dedicated stage height limiter and coarse focus stop prevent objective–slide collision during rapid focusing—a critical safety feature in shared teaching labs with novice users.

Sample Compatibility & Compliance

The ECLIPSE Si accommodates standard 1″ × 3″ glass slides (75 × 25 mm), petri dishes (up to 100 mm diameter), and multi-well plates when used with optional low-profile stage inserts. It supports brightfield, phase contrast (with optional CFI Plan Fluor PH objectives and condenser), and simple polarized light configurations. While not designed for live-cell environmental control (e.g., CO₂ incubation or heated stages), its mechanical stability and optical fidelity make it suitable for fixed-tissue analysis under GLP-aligned workflows. The LED illumination complies with IEC 62471 photobiological safety standards for Class 1 LED devices. The instrument meets ISO 10993-1 biocompatibility requirements for external contact surfaces and conforms to CE marking directives for laboratory equipment (2014/30/EU EMC and 2014/35/EU LVD).

Software & Data Management

The ECLIPSE Si is compatible with Nikon’s NIS-Elements Basic software suite (sold separately), enabling image capture, annotation, measurement, and basic report generation. When paired with a USB 3.0 CMOS camera (e.g., DS-Fi3), the system supports time-lapse acquisition, Z-stack reconstruction, and export to TIFF, JPEG2000, or OME-TIFF formats for interoperability with open-source platforms such as QuPath or ImageJ/Fiji. Audit trail functionality—including user login, timestamped acquisition metadata, and parameter logging—is available in NIS-Elements Advanced editions compliant with FDA 21 CFR Part 11 requirements for regulated educational and diagnostic support environments.

Applications

• Routine histology and cytology screening in hospital pathology departments and academic core facilities.
• Undergraduate biology and medical laboratory science instruction—covering cell structure, mitosis, tissue architecture, and microbiological identification.
• Quality control in pharmaceutical manufacturing for raw material inspection (e.g., excipient particle morphology, sterility test slide verification).
• Research support in developmental biology labs conducting comparative morphological analysis of fixed embryonic sections.
• Veterinary diagnostic services requiring robust, low-maintenance brightfield microscopy for parasitology and hematology.

FAQ

Is the ECLIPSE Si compatible with digital cameras from other manufacturers?
Yes—any C-mount or Nikon F-mount camera with appropriate adapter can be mechanically and optically coupled; however, full software integration and hardware-triggered acquisition require Nikon-certified imaging devices.
Can phase contrast be added post-purchase?
Yes—phase contrast capability is enabled by installing CFI Plan Fluor PH objectives, a phase contrast slider in the condenser, and matching phase annuli in the nosepiece turret.
Does the LED illumination require external power conditioning?
No—the integrated LED driver accepts 100–240 V AC input and includes surge protection and thermal regulation; no uninterruptible power supply (UPS) is required for standard operation.
What maintenance is recommended for long-term optical performance?
Annual cleaning of optical surfaces by certified service personnel and biannual verification of Köhler alignment using the included centering telescope are advised per Nikon’s Service Manual SM-ECLIPSE-Si Rev. 3.2.
Is the ECLIPSE Si suitable for fluorescence imaging?
No—this model lacks a fluorescence excitation light path, filter cube turret, or dichroic mirror housing; fluorescence-capable variants include the ECLIPSE Ni series.