Efficient, safe and stable: 18 detailed suggestions for the construction of optical experimental platforms

——Microscopy and Analysis May 2025 technical guide Chinese interpretation Original author: Dr. Ulrike Boehm (Carl Zeiss AG) Original journal: Microscopy and Analysis, Vol. 39 Issue 2, May 2025 Core keywords: optical platform design, laser laboratory safety, experimental data quality, laboratory management specifications

1. Preface: Why is optical platform design important?In the fields of modern physics, engineering, and bio-optics, the quality of experimental data not only depends on the accuracy of the instrument itself, but is also profoundly affected by the experimental environment and optical system design.Especially for experiments involving high-power lasers, femtosecond pulses, and complex nonlinear processes, any structural negligence may lead to vibration, errors, and even safety accidents.However, systematic training materials on “how to rationally layout laboratory optical platforms” are currently extremely scarce on the market.Researchers mostly rely on manufacturer manuals, peer experience, or the "build and then modify" method to explore, which is time-consuming and can easily lead to hidden dangers.This article will systematically sort out the 18 design and construction suggestions put forward in the document, and unfold them one by one from the perspective of laboratory management and technology to help readers build an "efficient, safe, long-term sustainable operation" optical experimental system.

2. Platform structure design and personnel accessibility

1. Surround accessibility design ✅ Core purpose: to facilitate the adjustment of optical components at any position ✅ Implementation suggestions: · All equipment should be kept at least 60cm away from the wall;·Do not pile cables or air pipes on the edge of the platform;·Facilitate multi-person collaboration and reduce cross-platform risks.

2. Overhead Rack ✅ Functional advantages: · Install the control computer, power supply, and cooling module in the air;·Completely avoid mechanical coupling between the rack and the optical platform;·Reduce the impact of vibration on lasers and interference systems.

3. Rack height and auxiliary tools ✅ Height setting recommendations: ·The lowest edge is about 30cm higher than the height of an adult;· Equipped with a stable step stool that complies with laboratory specifications to take care of short experimenters;·All interfaces and knobs can be easily operated by raising your hand.

3. Electrical layout and operational stability

4. Centralized power socket configuration ✅ Recommended number: 15~20 (including redundancy) ✅ Specific layout: · Centrally installed on a hanging rack;·No floor cables or multiple plug-in boards in the corners;·Each socket is labeled with a number to facilitate fault tracking and management.

5. Peel off the keyboard and mouse bracket from the platform✅Cause:·Micro vibrations caused by human typing/clicking will cause laser drift;·Especially has a significant impact on femtosecond interferometry and pump-probe experiments;·The mouse/keyboard bracket is recommended to be hung on the lower end of the rack or on the wall rail system.

4. Laser safety and laboratory specifications

6. Complete laser protection measures ✅ Necessary configuration: · Laser safety curtain (to block laser leakage);·"Laser in Use" light or electronically controlled reminder;·Clearly classified goggle storage areas (e.g. color-coded by wavelength);·Safety manuals and first aid instructions are posted at the entrance.

7. Dry compressed air suspension air supply system✅ Mainly used for: ·Vibration isolation air cushion for floating optical platforms (such as TMC/Thorlabs, etc.);·The pipeline can be introduced through the top metal bracket to avoid entangling the feet;·Every week, the platform corners need to be gently pushed by hand to confirm that the floating system is operating well.

5. Laboratory environment and error prevention

8. Avoid false interference from reflective surfaces✅ Sources of danger: Glass cabinet doors, whiteboards, and instrument surfaces may cause accidental reflection of laser;·Uncontrollable interference fringes, light leakage interference, and retinal damage may occur;✅ Countermeasures: ·Cover suspicious areas with black non-reflective film;·If necessary, rotate the equipment layout direction to avoid the reflection angle.

9. Standardized management of tools✅ Method: ·Clearly divide "imperial/metric" screwdrivers and hexagon sockets in each tool box;·Mark the system units of equipment imported from overseas (such as the United States/Germany/Japan);·Use the same standard components in a unified manner to avoid damage caused by misuse.

10. Labeling of optical components of the bracket✅ Content suggestions: Use heat-resistant stickers to mark "filter model + center wavelength" on the edge of the bracket;·Use color coding to distinguish reflectors/filters/windows;·It is recommended to combine the ERP system numbering to form a material asset tracking mechanism.

6. Optical system construction and debugging skills

11. Preliminary layout drawing ✅ Method: Use AutoCAD or hand-drawing software to draw the preliminary layout;·Mark the laser path, reflector serial number, and area to be debugged;·It is recommended to use a whiteboard pen to mark the beam trajectory directly on the platform.

12. The dual-mirror system realizes translation and rotation adjustment✅ Principle: ·The adjustment structure composed of two mirrors can realize the up and down/left and right translation of the laser path;·Appropriate spacing (>10cm) can achieve sufficient sensitivity;·Used for key links such as collimation, incident adjustment, and polarization angle control.

13. Dielectric lens (including filter) incident angle control ✅ Reasons: · High-reflective coatings and multi-layer interference filters are often designed at 45°;·Angle deviation will significantly reduce reflectivity or light transmittance;✅ Countermeasures: ·Use precision angle adjustment seat;·Confirm the product datasheet before measuring device design parameters.

14. Always keep the beam propagating within the platform plane✅ Double considerations of safety and geometry: · Ensure that all beams are vertical or horizontal for easy 90° adjustment;·Avoid areas at eye level as much as possible;·Reduce the risk of accidental exposure.

15. Align the optical path perforation and the hole array ✅ Suggestions: · Prioritize the laser beam to propagate along the center line of the platform hole array;·Convenient for later adjustment, positioning and installation of new devices;·Laser pointer + caliper can be used to assist in quick layout.

16. Initial low-power debugging✅ Recommended settings: ·Adjust the femtosecond laser to the minimum visible power (1~5%) when starting;·Use fluorescent cards and IR cards to mark light spots;·Non-essential personnel should leave the scene temporarily to reduce eye risks.

17. Set up light traps/light blocks to avoid accidental illumination✅ Purpose: ·Can temporarily place light blocks or blackened glass in front of key components;·Prevent the laser from hitting the detector, nonlinear crystal, etc. when it is not aligned;·Enhance equipment protection during debugging phase.

18. Optical path final closed cover✅ Typical structure: ·Use black acrylic or aluminum alloy frame + dustproof cloth;·It can be equipped with a removable upper cover for easy debugging and cleaning;·It has the functions of light shielding, dust prevention, air flow isolation and structural reinforcement.

7. Conclusion: The first principles of constructing an experimental platform. The design of an efficient experimental platform should aim at the minimum error rate, maximum stability, and maximum safety. All structures should be centered around the triple logic of "beam transmission path + personnel operation path + environmental isolation path".These 18 suggestions are the essence extracted from the front line of experiments. The suggestions are incorporated into laboratory rules and regulations, employee training materials and equipment procurement pre-review, and have become an important part of organizational standardization construction.

——Chinese interpretation of the technical guide of the May 2025 issue of Microscopy and Analysis

Original author: Dr. Ulrike Boehm (Carl Zeiss AG) Original journal: Microscopy and Analysis, Vol. 39 Issue 2, May 2025 Core keywords: optical platform design, laser laboratory safety, experimental data quality, laboratory management specifications

1. Introduction: Why is optical platform design important?

In the fields of modern physics, engineering, and bio-optics, the quality of experimental data not only depends on the accuracy of the instrument itself, but is also profoundly affected by the experimental environment and optical system design. Especially for experiments involving high-power lasers, femtosecond pulses, and complex nonlinear processes, any structural negligence may lead to vibration, errors, and even safety accidents.

However, systematic training materials on “how to rationally layout laboratory optical platforms” are currently extremely scarce on the market. Researchers mostly rely on manufacturer manuals, peer experience, or the "build and then modify" method to explore, which is time-consuming and can easily lead to hidden dangers.

This article will systematically sort out the 18 design and construction suggestions put forward in the document, and unfold them one by one from the perspective of laboratory management and technology to help readers build an "efficient, safe, long-term sustainable operation" optical experimental system.

2. Platform structural design and personnel accessibility

1. Design for surrounding accessibility

✅ Core purpose: facilitate the adjustment of optical components at any position ✅ Implementation suggestions:

• All equipment should be kept at least 60cm away from the wall;
• Do not pile cables or air pipes on the edge of the platform;
• Facilitate multi-person collaboration and reduce cross-platform risks.

2. Overhead Rack System

✅ Functional advantages:

• Install the control computer, power supply, and cooling module in the air;
• Completely avoid mechanical coupling between the rack and the optical platform;
• Reduce the impact of vibration on lasers and interference systems.

3. Rack height and auxiliary tools

✅ Height setting suggestions:

• The lowest edge is about 30cm higher than the height of an adult;
• Equipped with a stable step stool that complies with laboratory specifications to take care of short experimenters;
• All interfaces and knobs can be easily operated by raising your hand.

3. Electrical layout and operational stability

4. Centralized power socket configuration

✅ Recommended quantity: 15~20 (including redundant) ✅ Specific layout:

• Centrally installed on the hanging rack;
• No floor cables or multiple plug-in boards in the corners;
• Each socket is labeled with a number to facilitate fault tracking and management.

5. Peel off the keyboard and mouse bracket from the platform

✅ Reason:

• Micro vibrations caused by human typing/clicking can cause laser drift;
• Especially has a significant impact on femtosecond interferometry and pump-probe experiments;
• The mouse/keyboard bracket is recommended to be hung on the lower end of the rack or on the wall rail system.

4. Laser safety and laboratory specifications

6. Complete laser protection measures

✅ Necessary configuration:

• Laser safety curtain (to block laser leakage);
• "Laser in Use" light or electronically controlled reminder;
• Clearly classified goggle storage areas (e.g. color-coded by wavelength);
• Safety manuals and first aid instructions are posted at the entrance.

7. Dry compressed air suspension air supply system

✅ Mainly used for:

• Vibration isolation air cushion for floating optical platforms (such as TMC/Thorlabs, etc.);
• The pipeline can be introduced through the top metal bracket to avoid entangling the feet;
• Every week, the platform corners need to be gently pushed by hand to confirm that the floating system is operating well.

5. Laboratory environment and error prevention

8. Avoid false interference from reflective surfaces

✅ Source of danger:

• Glass cabinet doors, whiteboards, and instrument surfaces may cause accidental reflection of laser light;
• Uncontrollable interference fringes, light leakage interference, and retinal damage may occur;

✅ Countermeasures:

• Cover suspicious areas with black non-reflective film;
• If necessary, rotate the equipment layout direction to avoid the reflection angle.

9. Tool standardization management

✅ Method:

• Each tool box is clearly divided into "imperial/metric" screwdrivers and hexagon sockets;
• Mark the system units of equipment imported from overseas (such as the United States/Germany/Japan);
• Use the same standard components in a unified manner to avoid damage caused by misuse.

10. Labeling of bracket optical components

✅ Content suggestions:

• Use heat-resistant stickers to mark "filter model + center wavelength" on the edge of the holder;
• Use color coding to distinguish reflectors/filters/windows;
• It is recommended to combine the ERP system numbering to form a material asset tracking mechanism.

6. Optical system construction and debugging skills

11. Pre-layout drawing

✅ Method:

• Use AutoCAD or hand-drawing software to draw the preliminary layout;
• Mark the laser path, reflector serial number, and area to be debugged;
• It is recommended to use a whiteboard pen to mark the beam trajectory directly on the platform.

12. Double-mirror system realizes translation and rotation adjustment

✅ Principle:

• The adjustment structure composed of two mirrors can realize the up and down/left and right translation of the laser path;
• Sufficient sensitivity can be obtained only with appropriate spacing (>10cm);
• Used for key links such as collimation, incident adjustment, and polarization angle control.

13. Dielectric lens (including filter) incident angle control

✅ Reasons:

• High-reflective coatings and multi-layer interference filters are often designed at 45°;
• Angle deviation will significantly reduce reflectivity or light transmittance;

✅ Countermeasures:

• Use a precision angle adjustment seat;
• Confirm the product Datasheet before measuring device design parameters.

14. Always keep the light beam propagating within the platform plane

✅ Double considerations of safety and geometry:

• Ensure that all light beams are vertical or horizontal for easy 90° adjustment;
• Avoid the human eye level area as much as possible;
• Reduce the risk of accidental light exposure.

15. Alignment of optical path perforation and hole array

✅ Suggestions:

• Priority is given to allowing the laser beam to propagate along the center line of the platform hole array;
• Convenient for later adjustment, positioning and installation of new devices;
• Laser pen + caliper can be used to assist in quick layout.

16. Initial low-power debugging

✅ Recommended settings:

• Adjust the femtosecond laser to the minimum visible power (1~5%) when starting;
• Use fluorescent cards and IR cards to mark light spots;
• Temporarily leave the scene for non-essential personnel to reduce eye risks.

17. Set up light traps/light blocks to avoid accidental illumination

✅ Purpose:

• Can temporarily place light blocks or blackened glass in front of key components;
• Prevent the laser from hitting detectors, nonlinear crystals, etc. when it is not aligned;
• Enhance equipment protection during the debugging stage.

18. Optical path final closed cover

✅ Typical structure:

• Use black acrylic or aluminum alloy frame + dustproof cloth;
• A removable upper cover can be set for easy debugging and cleaning;
• It has the functions of light shielding, dust prevention, air flow isolation, and structural reinforcement.

7. Conclusion: The first principle of building an experimental platform

The design of an efficient experimental platform should aim at the minimum error rate, maximum stability, and maximum safety. All structures should be centered around the triple logic of "beam transmission path + personnel operation path + environmental isolation path".