Custom Light Sources for Analytical Instruments
Precise light. Reliable electronics. Reproducible measurement results.
In analytical instruments, the light source, drive circuitry, and optical coupling directly influence measurement accuracy, signal quality, and repeatability. LEJ develops and manufactures custom LED light sources, multichannel systems, lamp-based illumination systems, and stable power supplies for these applications—as integrable OEM assemblies ranging from functional prototypes to mass production.
We support equipment manufacturers, particularly when a standard product does not adequately meet the required wavelength, power, stability, form factor, or interface. In doing so, we do not view the light source in isolation, but rather as part of the entire optical and electronic system.
Discuss an OEM lighting solution for your analytical instrument
Please provide us with the wavelength, required optical power, installation space, interfaces, and planned annual production volume. We will evaluate the most suitable technical and cost-effective solution.
Typical Applications
Fluorescence and Image-Based Analytics
For fluorescence excitation, imaging analysis, and optical detection, defined wavelengths, reproducible intensity, and precise control are crucial. Depending on the measurement principle, single wavelengths, multiple independently controllable channels, or rapid sequences may be required.
- Fluorescence Scanners and Cell/Tissue Analysis
- FISH and Cytogenetics Systems
- Assay and Microplate Readers
- Image-based particle and sample analysis
- Optical Detection in Automated Laboratory Instruments
UV/VIS Spectroscopy and Photometric Systems
For UV/VIS and spectroscopic applications, the light source must be suitable for the spectral range, the measurement geometry, and the detection method. Not only the nominal wavelength or lamp type is crucial, but also the spectral bandwidth, intensity stability, ripple, temperature behavior, and coupling efficiency.
- Absorption and Transmission Measurements
- Spectral Analysis and Photometric Methods
- Reference and Comparative Measurements
- UV-Based Detection and Testing Methods
- Calibration and Measurement-Related Lighting Tasks
Laboratory Automation and Optical Measuring Instruments
In automated devices, the light source, control system, and mechanical components must be reliably integrated into the overall system. LEJ provides support for compact designs, long product lifecycles, defined interface communication, and cost-effective production of small and medium-sized production runs.
- Laboratory Automation and Systems Related to Liquid Handling
- Microfluidics and Lab-on-a-Chip
- Environmental and Process Analytics
- Material and Surface Analysis
- Custom Optical Measuring Instruments
What requirements must an OEM light source meet?
- defined wavelengths or spectral ranges
- Reproducible optical performance and low drift
- Homogeneous or precisely shaped light coupling into optical systems, optical fibers, or sample chambers
- Minimal thermal impact on the sample, sensors, and housing
- Precise driver and power supply electronics
- Triggering, pulse mode, or sequential channel control
- Mechanical and electrical interfaces for device integration
- Documentation, verifiability, and long-term availability in production
Technical Solutions
Why the Overall System Matters
In OEM projects, it often becomes apparent that a nominally suitable wavelength alone is not sufficient. Only the interaction of the light source, optics, electronics, mechanics, thermal management, and software creates stable measurement conditions. LEJ therefore takes the following factors into account, among others:
- Optical coupling, collimation, and optical fibers
- Adapters and Mechanical Interfaces
- Heat Transfer and Temperature Stability
- Driver, Ballast, and Control System
- Triggers, Sequences, and Communication
- Testing Approach, Interchangeability, and Service
- Component Availability, Redesign, and EOL Management
From the Initial Request to Mass Production
- Job Description:
- Wavelength, power, stability, optics, installation space, interfaces, and quantity.
- Technical Concept:
- Selection of LEDs, lamp technology, drivers/ballasts, optics, mechanical components, and cooling systems.
- Prototyping:
- Functional prototypes, measurements, thermal design, and integration.
- Validation:
- Stability, repeatability, temperature response, service life, and device interfaces.
- Industrialization and Mass Production:
- Documentation, test equipment, procurement, mass production, quality assurance, and lifecycle support.
Platforms and Entry Points
- Compact single- or dual-wavelength solution: NANO-/MAGNA-based OEM platform
- Multiple independently controllable wavelengths: MULTILUX/LQ-LED-8-based platform
- Broad or multi-line spectrum: Lamp-based system with an electronic ballast
- Short pulses and rapid sequences: LED pulse controllers / custom driver electronics
- Special Design or Interface: Custom OEM Light Engine
Why LEJ?
- Expertise in light sources, electronics, and integration—all from a single source
- Development, Prototyping, and Transition to Mass Production in Jena
- More than 30 years of experience in electronics and photonics
- Suitable for small and medium-sized production runs as well as variants
- ISO 9001 Quality Management and Documented Inspection Processes
- Lifecycle, Service, and Obsolescence Support
Start an analytics project
Let’s determine which light source, electronics, and integration architecture are best suited for your analytical instrument.
FAQ
Which light source is suitable for UV/VIS spectroscopy?
The choice depends on the spectral range, bandwidth, intensity stability, measurement geometry, and detector. LEDs are suitable for specific wavelengths and rapid control; xenon, Hg, HgXe, or spectral lamps may be appropriate for broader or line-rich spectra.
When is it advisable to use multi-channel LED light sources?
When multiple wavelengths need to be controlled independently, switched sequentially, or have their intensity regulated—for example, in fluorescence, multispectral analysis, or when multiple measurement modes are used in a single device.
How important is intensity stability?
Fluctuations in light output, temperature, or light coupling can affect the signal and, consequently, measurement repeatability. The required stability must therefore be determined based on the measurement principle, accuracy target, and calibration concept.
LED or gas-discharge lamp?
LEDs offer compactness, long service life, fast switching, and good control. Lamp-based systems remain a viable option when specific spectral lines, broad spectra, or high optical power are required.
What information does LEJ need for an initial OEM evaluation?
Useful information includes wavelength or spectrum, optical performance specifications, working distance or coupling, operating mode, installation space, interfaces, environmental conditions, planned quantity, and target date.
