Tube Lens – High-Precision Optical Solution
What is a Tube Lens?
A tube lens is an essential component in an infinity-corrected optical system. It is used to focus parallel light rays coming from an objective lens onto an image plane, such as a camera sensor or eyepiece. Tube lenses are widely used in microscopes, laser systems, and imaging devices.
Microscope Tube and Its Function
A microscope tube houses the optical components that direct light from the objective lens to the eyepiece or camera. The tube lens function is to collect collimated light from the infinity-corrected objective and focus it correctly. Without a high-quality tube lens, image clarity and resolution will be compromised.
Extension Tube Lens
An extension tube lens is used to extend the optical path in imaging systems. It helps in adjusting magnification and working distance without altering the primary lens. This is commonly used in macro photography, microscopy, and scientific imaging.
Ghost Tube Lens and Optical Quality
A ghost tube lens refers to an optical lens with reflections or ghost images caused by poor coatings or design. To eliminate ghosting, high-quality tube lenses use anti-reflective (AR) coatings that enhance light transmission and reduce unwanted reflections. Our tube lenses are precision-coated to ensure minimal ghosting and optimal performance.
Tube Lens Focal Length
The focal length of a tube lens determines the final image size and resolution. Common focal lengths include 200mm, 180mm, and 165mm, depending on the microscope system:
- 200mm – Used in Nikon systems.
- 180mm – Compatible with Olympus microscopes.
- 165mm – Found in Leica and Zeiss systems.
For custom applications, we offer focal lengths tailored to your specific needs.
Tube Lens Design and Customization
The design of a tube lens depends on factors like focal length, numerical aperture (NA), and aberration correction. We manufacture tube lenses with:
✔ Precision-ground optics for superior image quality
✔ Custom coatings for high transmission
✔ Various focal lengths to match your system
✔ OEM and custom solutions for specialized applications
We can customize tube lens designs based on your requirements, including diameter, coating, focal length, and housing material.
Tube Lens Magnification
The magnification of a tube lens depends on its focal length and the objective lens. The formula is:
[ \text{Total Magnification} = \frac{\text{Objective Magnification} \times \text{Tube Lens Focal Length}}{\text{Standard Focal Length (e.g., 200mm)}} ]
For example, using a 10x objective with a 200mm tube lens provides a total magnification of 10x. A different focal length tube lens can increase or decrease magnification accordingly.
Why Choose Our Tube Lenses?
- High-Quality Germanium, Quartz, and Optical Glass materials
- Customizable focal lengths and coatings
- Low distortion, high transmission, and minimal aberration
- Suitable for microscopes, laser systems, and custom optical setups
Contact Us for Custom Tube Lenses
Looking for a custom tube lens? We provide OEM and bespoke solutions for various industries. Send us your specifications, and we will deliver high-precision tube lenses that meet your requirements. Contact us today!