Polarized Light Imaging

Knowledge about crystallization processes and crystal orientation is essential for material, process and product development as they strongly influence the product’s final properties. Utilizing polarized light, the Polarized Light Imaging Option allows observation of effects like flow induced crystallization processes of polymers or local shear induced effects as they may occur in liquid crystals.

Introduction

Knowledge about crystallization processes and crystal orientation is essential for material, process and product development as they strongly influence the product’s final properties. Utilizing polarized light, the Polarized Light Imaging Option allows observation of effects like flow induced crystallization processes of polymers or local shear induced effects as they may occur in liquid crystals.

The wave model of light describes light waves oscillating at right angles to the direction of propagation with all directions being equally probable, see Figure 1. This is referred to as "common" or "nonpolarized" white light. A polarizing filter selects a single component of polarized light to pass through while absorbing all other components of incoming waves. If a second polarizing filter is placed above the first one, but with its polarization axis rotated by 90 °, no light can pass through because the polarization passed by the first filter is blocked by the second filter.

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