✅ Product Description

Fine slit optical grating plate made from stainless steel material.

High precision etching ensures uniform slit width and spacing.

Provides stable light modulation for optical systems.

Excellent corrosion resistance and mechanical strength.

Customizable slit structure and dimensions for various uses.

✅ Applications

Optical measurement and detection systems

Encoder feedback components

Laser optical control equipment

Industrial automation sensors

Precision instrumentation

Case Study: Custom Micro Slot Grating for a High-End Medical Device

In the medical technology sector, precision is not just a metric—it is a matter of patient safety and diagnostic accuracy. Recently, our factory was approached by a leading medical device manufacturer developing a next-generation blood analysis system. They faced a critical bottleneck: the optical sensing module required a Fine Slit Stainless Steel Plate with specifications that exceeded the capabilities of their current supplier.

This case study details how we leveraged our precision chemical etching expertise to solve their technical challenges, delivering a custom micro slot grating that met their rigorous performance standards.

The Challenge: Pushing the Limits of Resolution

The client’s R&D team was designing a high-throughput flow cytometer. To achieve the necessary signal-to-noise ratio for detecting microscopic cells, they needed a slit plate with an exceptionally fine pitch and a high open-area ratio.

Technical Requirements:

• Material: 0.1mm thick Stainless Steel (SUS316) for corrosion resistance against biological reagents.
• Slot Width: 50 microns (0.05mm).
• Pitch: 100 microns (0.1mm).
• Critical Constraint: Zero burrs and absolute flatness to prevent light scattering.

The client had previously attempted to source this component using mechanical punching, but the process introduced micro-burrs that clogged the optical path. They also tried laser cutting, but the heat-affected zone caused the thin plate to warp, ruining the focal depth.

Our Solution: Precision Chemical Etching

Upon reviewing their CAD files, our engineering team identified that chemical etching was the only viable manufacturing method. Unlike mechanical methods, etching does not exert force or heat on the material, preserving the integrity of the Fine Slit Stainless Steel Plate.

Step 1: Digital Tooling for Rapid Iteration
Since this was a prototype phase, the client needed to tweak the slot geometry frequently. We utilized digital photoplots, eliminating the need for expensive hard tooling. This allowed us to modify the design instantly based on their feedback, reducing the lead time from weeks to days.

Step 2: Solving the "Bridging" Issue
The initial design had a high risk of "bridging"—where the metal between slots fails to etch away completely due to narrow spacing. We adjusted the etching parameters and utilized a "shingling" technique to ensure the chemicals could penetrate the 50-micron gaps effectively.

Step 3: Surface Finishing
To further enhance the optical performance, we applied a specialized black oxide finish. This reduced stray light reflection, significantly improving the contrast of the sensor readings.

Comparison: Why Etching Won

To illustrate why we chose this process for the custom micro slot grating, we compared the results against the client's previous attempts:

The Result: A Successful Partnership

We delivered the first batch of prototypes within 5 business days. The Fine Slit Stainless Steel Plate passed the client's optical calibration tests with flying colors. The burr-free edges ensured that no debris interfered with the fluidics, and the precise pitch alignment allowed for accurate cell counting.

Following the successful prototype, the client moved to mass production. Our ability to scale from digital prototyping to volume manufacturing without changing the production method ensured that the quality remained consistent from the first sample to the thousandth unit.

Conclusion

This project highlights the importance of selecting the right manufacturing process for complex optical components. By choosing chemical etching over traditional methods, we were able to deliver a custom micro slot grating that solved the client's technical hurdles. Whether for medical devices, scientific instruments, or industrial sensors, our factory is equipped to turn complex designs into high-precision reality.

Contact Us for Your Project
Have a complex optical design? Let us help you solve the manufacturing challenges.
Contact: Luna
WhatsApp: 12132219094

Frequently Asked Questions (FAQ)

Q1: Can you manufacture gratings for medical fluidic applications?

A: Yes. We have extensive experience manufacturing Fine Slit Stainless Steel Plates for medical devices. We can ensure biocompatibility by using medical-grade stainless steel (SUS316) and rigorous cleaning processes.

Q2: How do you handle design changes during the prototyping phase?

A: Because we use digital tooling, we can modify the photoplot files instantly. This allows for rapid design iterations without the cost or delay of modifying physical molds.

Q3: What is the tightest pitch you can etch?

A: While it depends on the material thickness, we can achieve pitches as tight as 0.1mm and slot widths down to 0.05mm with high consistency.

Q4: Do you offer surface treatments to reduce light reflection?

A: Yes. We offer black oxide and other specialized coatings that reduce reflectivity, which is essential for high-contrast optical sensing applications.

Q5: Can you match a grating if I only have a damaged sample?

A: Yes. We offer reverse engineering services where we can measure the pitch and slot dimensions of a physical sample to reproduce a replacement custom micro slot grating.