Sony FCB camera block
In the blueprint for the construction of the digital operating room, the surgical video cameras plays the role of the “visual center”. However, although the shadowless lamp eliminates shadows, its high-intensity illumination forms stubborn “light spots” on the surfaces of instruments and tissues, resulting in local overexposure and loss of dark areas in the image, seriously interfering with the doctor’s judgment.
How to achieve true color reproduction in strong light environments?
From April 9th to 12th, 2026, the 93rd China International Medical Equipment Fair (CMEF) will be held at the Shanghai National Exhibition Center. Ruiloog Electronic (Exhibition Booth: Hall 8, Stand 8.1Q43) will showcase Sony FCB series camera modules and medical operating room side-mounted and center-mounted surgical video cameras. At the exhibition, they will disassemble the side-mounted and center-mounted surgical video cameras to reveal the three core technologies that solve the problem of light spots, providing a practical and solid solution for upgrading the visual experience in operating rooms.
I. The Pain of Light Spot: The “Visual Blind Zone” of Digital Operating Rooms
The multi-light source design of the shadowless lamp was intended to eliminate shadows. However, in actual operation, the strong light reflection easily exceeds the dynamic capture range of the camera sensor, resulting in glaring white patches.
The traditional solutions often fall into a dilemma:
Reduce overall exposure → Details in the dark areas (such as deep inside the body cavity) are obliterated;
Maintain normal exposure → The bright areas (such as metal instruments) turn completely white.
Due to different installation methods, the challenges faced by the two types of surgical video cameras are also different:
For the side-mounted models: The angle between the lens and the shadow-free light axis is small, making them prone to being “blinded” by direct reflected light;
For the mid-mounted models: Although the light axis alignment is high, the dynamic reflected light caused by the movement of the instruments still leads to local overexposure.
Ruiloog Electronic, relying on Sony’s medical-grade imaging module, has systematically solved this engineering problem through a “optical hardware + intelligent algorithm + system collaboration” triple defense line.
II. Three-layer Technical Defense Line: From Physical Suppression to Intelligent Repair
1. Optical Base: Sony Caliber + Special Coated Lens
(1) Sony FCB-EV9520L Caliber
Equipped with Sony’s new STARVIS 2 CMOS, combined with 30x optical zoom, through multi-frame synthesis technology, it achieves an approximately 130dB wide dynamic range, while simultaneously preserving the high-contrast outline of metal instruments and the texture details of deep tissues.
(2) Medical-grade multi-layer coated zoom lens
The lens surface is coated with a series of low-reflectivity optical films, which physically block stray light from entering, significantly reducing the probability of glare generation, laying a “clean” optical foundation for imaging.
2. Intelligent Algorithm: Zone Light Control + Spectral Customization
(1) Zone Strong Light Suppression Algorithm
Based on Sony’s integrated core platform, Xuan features an in-built self-developed automatic strong light suppression algorithm:
The system analyzes the brightness distribution of the picture in real time;
Precisely identifies overexposed areas (such as reflective points of equipment);
While not affecting the overall brightness, it only performs dynamic darkening processing on the light spot areas.
Result: The picture is clear and transparent, without “dead white” areas, and all details are clearly visible.
(2) Customized Engine for Shadowless Light Spectra
Relying on Sony’s advanced ISP image processing capabilities, the system can identify the spectral characteristics of different brands and types of shadowless lights, and dynamically adjust the gamma curve and white balance matrix to specifically filter out the stray light bands that cause reflection.
Whether it is cold white light or warm yellow light, it can eliminate the light spots while highly restoring the true color of the tissue, avoiding color drift.
3. System Collaboration: Specialized Software + Laser-Assisted Positioning
(1) Specialized Control Software for Fluorescence Lamp (Soft Copyright Certified)
To address the long-standing issue of excessive exposure in the surgical field, Ruiloog Electronic, based on 16 years of experience in video core development, has launched a specialized control software for fluorescence lamps with software copyright.
This solution breaks through the bottleneck of excessive light spots in the algorithm architecture, achieving clinical-level high-fidelity color reproduction, and providing stable and reliable underlying image support for surgical demonstration recording and remote consultations.
(2) Laser-assisted positioning system
By integrating guiding lasers on the camera, medical staff can quickly find the optimal non-reflective angle when installing or adjusting the lens. This helps to avoid the lens directly facing strong light sources from the very beginning, achieving precise light avoidance and optical protection at the physical level.
III. Conclusion: Make Every Gaze Clear and Reliable
Overexposure of the light spot is not an insurmountable technical limit but an engineering problem that can be systematically overcome.
The deep integration of Ruiloog Electronic and Sony’s medical imaging technology, from hardware selection to algorithm optimization, from single-machine performance to system collaboration, closely revolves around clinical practical needs, redefining the standards of the surgical room visual system.
April 9th – 12th, 2026
We sincerely invite you to visit the 8.1Q43 Pavilion of the 8th Hall at Shanghai National Exhibition Center to experience the peripheral and mid-mounted surgical video cameras firsthand.
CMEF 2026 Exhibition Information
Exhibition Date: April 9th – 12th, 2026
Exhibition Venue: National Exhibition and Convention Center (Shanghai)
Exhibition Booth: Hall 8, Booth 8.1Q43