In modern scientific research instrumentation systems, the PTFE integrating sphere plays a crucial role as a key optical device. Structurally, it is a closed sphere internally coated with a white diffuse reflective material, also widely referred to as a photometric sphere or light flux sphere. One or more ports are set on the sphere wall, serving as the light entrance port and the receiving port for placing light detectors.

Inner Wall Requirements and Material Properties of PTFE Integrating Spheres

Strict requirements are imposed on the inner wall of a PTFE integrating sphere. It must be a good spherical surface, typically specified that its deviation from an ideal sphere should not exceed 0.2% of the inner diameter. The diffuse reflective material coated on the inner wall of the sphere should ideally have a diffuse reflectance coefficient approaching 1. In practical applications, common materials used are magnesium oxide or barium sulfate. These are thoroughly mixed with a colloidal binder and applied to the inner wall by spraying. Taking the magnesium oxide coating as an example, its spectral reflectance exceeds 99% within the visible spectrum. After light enters the PTFE integrating sphere, it undergoes multiple reflections on the inner wall coating, thereby forming a uniform illuminance. To achieve high measurement accuracy, the port fraction of the PTFE integrating sphere should be as small as possible. The port fraction here refers to the ratio of the area of the ports to the total inner surface area of the sphere.

Application Fields of PTFE Integrating Spheres

PTFE integrating spheres find wide application, primarily in the precise measurement of parameters such as optical power, flux, reflectance, and radiation dose of divergent light sources. Many measurement systems often require a uniformly illuminated environment. For example, when a laser is incident onto a rotating diffuser, the exiting light can achieve a uniform distribution after passing through the diffuser, while also reducing the coherence of the laser and effectively eliminating laser speckle. However, even so, due to the presence of zero-order light, it may still not meet the requirements for certain specific measurement systems.

Jingyi Optoelectronics' PTFE Integrating Sphere Products

In the field of PTFE integrating sphere research, development, and production, Jingyi Optoelectronics, leveraging its technical expertise and innovative capabilities, has launched a universal spectral PTFE integrating sphere – the JY-FOIS84. This PTFE integrating sphere offers high cost-performance and strong versatility, making it highly suitable for building various types of spectral measurement systems. It can be paired with corresponding accessories to achieve multiple functions, such as serving as a uniform light source, for laser power and spectrum measurement, transmittance measurement, and reflectance measurement, among others.

Product Design and Functional Features

Jingyi Optoelectronics' PTFE integrating sphere features an ingenious design with universal ports, allowing for quick installation of corresponding accessories based on different application scenarios, truly meeting the need for "one sphere, multiple uses". Its operation is simple and convenient, and its usage is flexible. Customers can also customize the size and position of the ports according to their specific requirements. Furthermore, Jingyi Optoelectronics' PTFE integrating sphere utilizes a diffuse reflective coating characterized by stability, excellent Lambertian properties, and high diffuse reflectance. This coating is not only resistant to yellowing but also not prone to peeling, ensuring that the PTFE integrating sphere consistently maintains good testing performance and provides reliable data support for researchers.

Certification and Capabilities

Jingyi Optoelectronics holds certifications, with a factory pass rate of 99.8%; it possesses the capability for PTFE reflective coating (average reflectance 99%), multi-size/port customization; and provides comprehensive pre-sales and after-sales technical support.

Applicable Scenarios

Applicable scenarios: LED luminous flux testing, laser power measurement, display color calibration, environmental monitoring, and other optical metrology applications.

Future Outlook

Jingyi Optoelectronics is always committed to providing customers with high-quality optical products and professional solutions. Its technological research, development, and application promotion in the field of PTFE integrating spheres have made significant contributions to the advancement of scientific research instrumentation systems. It is believed that in the future, with continuous technological progress and innovation, Jingyi Optoelectronics' PTFE integrating spheres will play a role in even more fields, providing strong support for the development of scientific research.

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