From used instruments to an autonomous physics laboratory

Research acquisition plan · 8 November 2026 · Proposal, not a completed experiment

1. Spectroscopy and optical measurement

Candidate: Ocean Optics USB2000+ at ¥1,680. Verify device identity, calibration and optical configuration before acquisition. Proposed experiments: LED spectral response, interference filters, diffraction gratings, photoluminescence screening, instrument-drift compensation and active-learning wavelength selection.

2. Time-domain sensing

Candidate: Rigol DS1054Z at ¥1,350, or damaged unit at ¥1,000. A four-channel scope would allow synchronous optical, electrical, acoustic and vibration signals. Check all channels, sample-rate conditions, triggering, included probes and actual upgrade state. The cheaper cracked-screen unit is not the default choice.

3. Next search categories

Event and machine-vision cameras: 事件相机工业相机二手
USB scientific cameras: 科研CMOS相机 USB3
Lock-in amplifiers: 锁相放大器二手
Optical tables, mounts and translation stages: 光学平台位移台二手
Photodiodes and low-noise transimpedance amplifiers: 光电探测器跨阻放大器
Piezoelectric drivers and actuators: 压电驱动器压电陶瓷
Aluminum extrusion and modular framing: 铝型材 4040 二手

4. Closed-loop experimental protocol

Define competing physical hypotheses and measurable discriminators.
Measure baseline instrument noise, response, repeatability and calibration.
Choose the next intervention by expected information gain, not visual novelty.
Record timestamped raw observations, control settings, sensor firmware, environmental variables and uncertainty.
Reserve blinded hold-out trials for validation. Report failures and artifacts alongside discoveries.

5. Deal scoring

Rank candidate listings by delivered price, verified function, measurement capability, integration cost, repair risk, availability and reproducibility. Seller claims remain unverified until independent evidence exists. Currency conversion, import VAT and shipping must be included before calling a listing a bargain.