The Radiant 5× Microscope Lens allows for high-resolution imaging of very small components and features, including individual LEDs, display pixels, and subpixels. This lens offers 5× or 10× magnification and can be directly attached to a ProMetric® Imaging Colorimeter or Photometer, which is available in various resolutions to cater to specific application requirements.
When used with Radiant ProMetric or TrueTest™ Software, this microscope lens provides a compact, effective photometric measurement solution for assessing the visual quality of displays and other devices.
Overview
Evaluate Individual Display Pixels
As display resolutions and pixel densities increase, there is a growing necessity to measure significantly smaller light-emitting components to guarantee the precision of light output, color, and other characteristics.
This is particularly relevant for emissive displays such as OLED, LED, or microLED, where each pixel generates its own luminance and can therefore exhibit variations in output from one pixel to another. These individual discrepancies can lead to display non-uniformity that is noticeable even from a distance, especially when the display is viewed at high brightness levels.
Once these variations are measured, the differences in output between pixels can be quantified and corrected. This process of normalizing pixel outputs results in a display that appears entirely uniform. These calibrations can be transferred from the design phase to ensure precise pixel output for the specific substrate or pixel arrangement of devices during production processes.
Characterize Subpixel Patterns
Image Credit: Konica Minolta Sensing Americas
Subpixel patterns, such as those depicted in the image, can be difficult to characterize without a high-resolution system and optics capable of microscopic measurements. The Microscope Lens offers 5× magnification of images obtained from high-resolution imaging systems, allowing design manufacturers to verify precise subpixel layouts, shapes, and RGB color patterns.
As illustrated, users can attain remarkable detail within a very confined spatial area, enabling the accurate imaging of individual elements that are significantly separated by light regions.
Characterize Individual LEDs
The physical composition of LEDs (light-emitting diode sources) is more intricate compared to that of most other lighting sources. Variations in brightness and color may arise from material, mechanical, or electrical flaws present in each emitter.
Assessing individual LEDs could be essential to ensure the efficacy of LED-based systems and achieve consistent brightness and color when multiple LEDs are arranged in an array.
The Radiant Microscope Lens serves as a tool for assessing the characteristics of LEDs, whether individually or in an array, encompassing:
- LED uniformity
- LED edge contrast (uniformity falloff)
- Impact of cross-talk between LEDs (unwanted illumination of one LED by an adjacent LED in an array or panel)
- Cross-sectional plots illustrating LED luminance uniformity
Measurement image of a single LED (left) and cross-section showing edge contrast of the LED (right), where luminance level falls off over a given distance in millimeters. Results shown in TrueTest Software. Image Credit: Konica Minolta Sensing Americas
Mount to ProMetric Photometers and Colorimeters
The Microscope Lens serves as an optional mounting accessory for the Radiant ProMetric Y Imaging Photometer or the ProMetric I Imaging Colorimeter. It is affixed using a custom mounting bracket to ensure stability.
This lens provides a comprehensive solution and is the most effective method for display measurement, since it requires minimal setup, integration time, equipment, and expertise, as it attaches directly to a ProMetric imaging photometer or colorimeter.
The Microscope Lens can be easily detached and substituted with standard lenses for various measurement applications, including those that necessitate the full field of view, such as luminance and chromaticity uniformity, contrast, mura, and other characteristics.
Microscope Lens Key Features and Highlights:
- Precise and dependable measurement of display luminance and chromaticity
- Imaging for numerous data points, enhancing measurement efficiency
- Magnification of details captured by high-resolution image sensors
- A blend of value, superior performance, and adaptability, tailored for R&D and quality assurance
- User-friendly measurement control and analysis software
All Radiant ProMetric camera solutions are equipped with ProMetric Software, an advanced software suite that facilitates intuitive camera setup and control, data acquisition, and image analysis. It also supports extensive data analysis and display functions, including isometric plots, cross-section graphs, radar plots, bitmaps, and CIE color plots.
For further measurement and test sequencing options, TrueTest Software provides a comprehensive range of Radiant display measurement capabilities.
Specifications
Source: Konica Minolta Sensing Americas
| Parameter |
Microscope Lens (5×) |
| Primary Application |
High-resolution measurement of small display and component features |
| Magnification |
4.8 |
| Working Distance |
40 mm (to front of lens) |
| Working F Number |
F/16.9 |
| Numerical Aperture |
0.15 |
| Paired Radiant Camera |
I2 or
Y2 |
I8 |
I16 or
Y16 |
I29 or
Y29 |
I16-G or
Y16-G |
I61 or
Y61 |
| Approx. Field of View |
1.8 x 1.3
mm |
3.7 x
2.8 mm |
5.5 x 3.7
mm |
7.4 x 4.9
mm |
3.0 x 1.7
mm |
7.4 x 4.9
mm |
Spatial Resolution
(by camera sensor size) |
1.10 µm |
0.57 µm |
0.74 µm |
| Measurement Capabilities |
Luminance, radiance, luminous intensity, radiant intensity, power, radiant flux, CIE chromaticity coordinates, correlated color temperature (CCT) |
| Dimensions |
Length: 9 mm | Maximum diameter: 64.3 mm |
| Weight |
0.4 kg |
Specifications subject to change without notice.
Compatible Products
- ProMetric Y Series Photometers: Y2, Y16, Y29, Y43, Y61
- ProMetric I Series Colorimeters: I2, I8, I16, I29, I61
System Recommendations
- Additional system requirements vary by camera.
- 16–32 GB RAM
- ProMetric Imaging photometer or colorimeter
- TrueTest™ software
- Windows® 10, 64-bit
Applications
Typical Applications
The Microscope Lens is well-suited for capturing intricate details with exceptional resolution. This camera/lens combination provides photometric imaging efficiency suitable for both off-line and in-line applications:
- High-resolution imaging of very small components and their features
- Assessment of display pixels and pixel structures, including at the subpixel level
- Examination of individual LEDs, such as microLEDs
- Characterization for display design and R&D
- Measurement for quality control at the end of the production line