Optomechanics · Test equipment

Soil analyzer

A benchtop optical measurement setup built around adjustability: precision stages, translating lens barrels, and a rotatable soil capsule.

Role
Complete optomechanical assembly · Lens positioning
CAD model of the horizontal optical bench layout on a breadboard
Horizontal bench layout · CAD

The Soil Analyzer is a benchtop optical measurement setup. Soil samples go into a dedicated capsule. A light source illuminates the sample through an optical window, an optical power meter reads the measurement-path intensity, and residual light is sent into a beam dump so it cannot return to the detector path and contaminate the signal.

Optical path. A section through the lens housing and the soil capsule below it.

Section view

Section view of the soil capsule, optical window and detector housing
Capsule and optical path · Section

Adjustability. The same stages and lens tubes, mounted on a vertical breadboard.

I developed the complete optomechanical assembly and was responsible for the mechanical components and lens positioning. Because it is a bench setup rather than a fixed instrument, adjustability was fundamental: components sit on precision stages, lens barrels translate for focus, and the soil capsule can be rotated and repositioned with control. The result is a flexible experimental platform that tolerates setup changes while holding precise optical alignment.

Vertical configuration

CAD model of the vertical breadboard configuration with stages and lens tubes
Vertical configuration · CAD
Next projectFree-space laser