Young girl is throwing away an empty plastic bottle into a trash bin. She uses correct garbage bin. Recycling
OEM Applications


  • Plastic sorting
  • Pulp & paper

Giving plastic a second life Plastic sorting

Plastics are low cost, durable synthetic materials that can be moulded into a variety of products. On top of the plastic litter in landfills, at least 14 million tons of plastic end up in oceans every year, endangering maritime species and bringing microplastics into the food chain. As most plastic types are not biodegradable, plastic waste will persist in our environment for at least a decade.

Making paper sustainable with recycling Pulp & paper

In paper production, 40 % of paper pulp is created from wood. Due to constantly increasing global paper demand, deforestation can only be slowed down by an efficient paper production cycle including the recycling of scrap paper.

Plastic sorting

Moving conveyor transporter on modern waste automated recycling processing plant. Separate and sorting garbage collection. Recycling and storage of waste for further disposal.

Automated plastic recycling

Plastic recycling is the most effective way to minimize the impact of pollution as it reduces oil usage, industrial waste water and greenhouse gas emissions. Plastic recycling relies on previous sorting steps, as different polymers cannot usually be blended into homogenous mixtures. Modern, large-scale sorting plants use NIR spectroscopy for different types of clear and colored polymers such as PET, HDPE/LDPE, PP or PS. ZEISS PGS NIR series (960 - 2500 nm) provides fast, real-time identification of polymers with diffuse reflection measurements. PGS spectrometers have a compact footprint, highest SNR and fast readout.  
Plane gratings in the VIS and NIR spectral range complete the product lineup for the single channel detection of polymers. Numerous standard plane gratings are available and suited to your specific requirements. Conveyor belt sorting processes are well suited to hyperspectral imaging spectrometers, combining spatial and spectral information in a single frame mode. ZEISS Offner gratings using holography and aberration correction are widely used for VIS and NIR spectral ranges.

Pulp & paper

A paper recycling factory plant shredding machine, shredding waste paper into square bails, ready to be pulped and reused. Recycle waste materials to offset pollution and save the planet.

Pulp & paper processing

VIS-NIR spectroscopy is used within the paper & pulp industry at many critical production steps for chemical composition analysis. This ranges from quality control of raw materials as wood chips, process control of pulping, paper web formation and pressing/drying steps to recycling of scrap paper. ZEISS MMS 1 (310 - 1100 nm) and PGS series (960 - 2500 nm) are ideal choices for in-line VIS-NIR spectroscopy, to determine lignin, cellulose, fiber fillers and moisture content.
Hyperspectral imaging is common in paper processing on conveyor belts. The combination of spectral and spatial information in one spectrometer with single image capture provides more efficiency. ZEISS offers customer-specific Offner gratings for the VIS / NIR spectral range using holographic manufacturing techniques with aberration correction at the grating element.

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