The main application fields of rhombic prisms

Core Application Fields of Rhombic Prisms

A rhombic prism is a special type of prism composed of four rectangular optical surfaces. Its core optical characteristic is that it can shift light without changing the direction of propagation, and it can also achieve a 90° rotation or inversion of the image. It is widely used in various precision optical systems. The following are its main application fields and technical values:

1. Precision Imaging and Observation Systems

High-end telescopes and microscopes

Rhombic prisms can adjust the azimuth of the image without deflecting the optical path, solving the problem of coaxial offset between the eyepiece and objective lens of telescopes, ensuring an upright and stable observation field. In metallographic microscopes and biological microscopes, they are used to correct the inverted state of the image, improving the comfort of observation and avoiding image distortion caused by optical path deflection.

Aerospace reconnaissance equipment

Mounted in the electro-optical reconnaissance payloads of unmanned aerial vehicles (UAVs) and satellites, the prism's translation property compensates for mechanical installation errors in the optical system, ensuring the geometric accuracy of reconnaissance images and enabling real-time rotation adaptation to meet the requirements of different display terminals.

2. Laser Transmission and Calibration Systems

Laser radar (LiDAR) optical path design

In vehicle-mounted and industrial LiDARs, rhombic prisms are used to translate and isolate the laser emission and reception paths, avoiding interference from the strong light of the emission end to the detector of the reception end, improving ranging accuracy and signal-to-noise ratio. They can also be used in conjunction with scanning mirrors to adjust the spatial position of the laser beam, expanding the scanning coverage.

High-precision laser calibration equipment

Used in the optical path calibration modules of photolithography machines and semiconductor wafer inspection equipment, its ability to translate light without deflection precisely adjusts the spatial position of the laser focus, ensuring the positioning accuracy of the lithography pattern or inspection spot reaches the micrometer level.

3. Industrial Measurement and Inspection Equipment

Three-dimensional contour measurement instruments

As a core component for optical path turning and translation, it is used in conjunction with line laser emitters and cameras to achieve directional transmission of the measurement beam, ensuring uniform scanning of the workpiece surface and improving the accuracy of three-dimensional contour data collection. It is widely used in the quality inspection of automotive parts and precision molds.

Optical theodolites and total stations

Used to correct the deflection of the measurement optical path, ensuring the consistency of the measurement benchmarks for horizontal and vertical angles, and achieving upright display of the observation image, reducing the visual fatigue of the measurement personnel and improving the accuracy of surveying data.

4. Medical and Scientific Optical Instruments

Medical endoscopy systems

Miniaturized rhombic prisms are integrated into endoscope probes to achieve a 90° rotation of the image, converting the inverted image collected by the probe into an upright view, facilitating the doctor's observation of the lesion location. At the same time, its compact structure can reduce the volume of the probe, enhancing the flexibility of minimally invasive surgery.

Spectral analysis equipment

In Raman spectrometers and fluorescence spectrometers, it is used to adjust the distance between the incident light and the detection light paths, avoiding interference between light beams of different wavelengths, improving the resolution and signal-to-noise ratio of spectral detection, and assisting in research and development of new materials and environmental pollutant detection.

UltraOpto Product Advantages

UltraOpto rhombic prisms are made of high-quality optical materials such as BK7 and fused silica, processed through ultra-precision polishing technology, with surface accuracy reaching λ/20 and angle tolerance ≤ ±1″. They can be customized in size and coating schemes according to customer requirements, providing high stability and high-precision optical path solutions for optical systems in various fields.