Case Study: Objective Lens Advancements for Medical Laser Instruments

In a recent project, Shanghai Optics, a leading custom optics company, took on the challenge of developing objective lenses for medical laser instruments. This endeavor required meeting strict specifications, including an Effective Focal Length (EFL) of 10mm, a Numerical Aperture (NA) of 0.5, a working distance exceeding 22mm, and compatibility with laser wavelengths ranging from 350 to 850 nm. 

The client’s requirements presented several challenges, particularly the demanding 0.5 NA specification driving up costs and the inefficacy of traditional lens materials for 350-nanometer laser applications. Shanghai Optics adopted an innovative strategy after meticulously analyzing the client’s needs and challenges. Their approach not only addressed the 0.5 NA requirement but also focused on cost reduction.

Overcoming Marital Challenges

In addressing the challenges of traditional lens materials for 350-nanometer laser applications, Shanghai Optics engineers meticulously chose alternative materials to minimize absorption and improve cost efficiency. Additionally, Shanghai Optics focused on cost-effectiveness by reducing the number of optical components without sacrificing performance through design strategies such as relaxing axial color tolerances and streamlining manufacturing processes. Crucial to the project’s success was the optimization of the lens design for multiple laser wavelengths, achieved by utilizing Modulation Transfer Function (MTF) diagrams to ensure precise separation of laser spots and exceeding client expectations.

Figure 1 displays the Modulation Transfer Function (MTF) for laser wavelengths at 350 nm

Figure 2 depicts the MTF and spot diagram for 350 nm laser wavelengths

Figure 3 shows the Modulation Transfer Function (MTF) for laser wavelengths at 850 nm

Figure 4 depicts the Modulation Transfer Function (MTF) and spot diagram for laser wavelengths at 850 nm

Shanghai Optics’s innovative approach to designing objective lenses for medical laser instruments, accommodating wavelengths from 350 to 850 nm, demonstrates their commitment to excellence and cost-effectiveness. By addressing challenges such as the 0.5 NA requirement and material limitations, Shanghai Optics not only met specifications but also significantly reduced costs. This strategic approach highlights Shanghai Optics’s ability to deliver advanced solutions for complex optical challenges in the medical device industry.

Do not hesitate to contact Shanghai Optics today. We’d be more than happy to discuss your projects and how best they can become a success.