Polariscope Strain Viewer - Computerised

Overview of Polariscope Strain Viewer - Computerised

See strain patterns that ordinary inspection can miss
A routine visual check shows the surface appearance of a preform. Polariscope inspection provides a different view by revealing optical patterns associated with birefringence inside the material. Comparing similar samples under consistent inspection conditions can help a quality team spot differences between batches or investigate changes after a process adjustment. The findings should be assessed against an approved reference and the manufacturer’s inspection criteria. A visible pattern does not automatically mean a sample must be rejected. Its interpretation depends on the material, sample geometry, orientation and inspection method.

How does a polariscope strain viewer work?
The instrument passes polarised light through a transparent sample and views it through an analyser. Birefringence changes how light travels through the material, producing visible light-and-dark or coloured patterns, depending on the optical arrangement.
The operator positions the sample, observes the pattern and compares it with a suitable reference. Keeping the lighting and sample orientation consistent makes comparisons more useful.

This is primarily a visual inspection method. A strain image alone should not be treated as a direct measurement of bottle strength or an exact numerical stress value.

Choosing the computerised configuration
When inspections need to be reviewed on a computer, the imaging and software functions matter as much as the viewing system.
Discuss your workflow with Pacorr to confirm:

• Whether camera capture and live computer viewing are included.
• Which image-saving and comparison functions are available.
• Whether inspection records can include sample or batch identification.
• Which report formats the software supports.
• Computer requirements and whether a computer is supplied separately.

Selecting these functions around your inspection process helps ensure the equipment meets your team’s day-to-day requirements.

Where can it be used?

• PET preform inspection: Review strain patterns in suitable transparent preforms before further processing.
• Batch comparison: Examine samples of the same design under consistent conditions to investigate variations.
• Process trials: Compare observations before and after changes to moulding or cooling conditions.
• Transparent component inspection: Discuss glass or other transparent plastic samples with Pacorr to confirm optical suitability, sample fit and the required configuration.

What to check before ordering
The viewing area must accommodate your sample and allow it to be positioned correctly. The lighting, optics and software should also suit the inspection you need to perform.
Send Pacorr the material type, sample dimensions, expected inspection volume and reporting requirements. If your procedure follows a particular test method, include that information with your enquiry.

Frequently asked questions

Can a polariscope be used for PET preform inspection?
Yes. It can reveal birefringence patterns in suitable transparent PET preforms. These observations help quality teams compare samples and decide where further investigation is needed.

Does it measure the strength of a bottle?
No. Polariscope inspection examines optical strain patterns. Mechanical performance requires the relevant strength or pressure tests.

Is every coloured pattern a defect?
No. Patterns must be interpreted in context. Use an approved inspection procedure and suitable reference samples rather than judging a part by colour alone.

Can it inspect glass containers?
Suitability depends on the glass sample, its dimensions and the instrument configuration. Share your application with Pacorr before selecting a model.

What is the price of a computerised polariscope strain viewer?
Request a quotation for your required configuration. Include your sample size, camera and software requirements, and any installation or training needs so the quotation covers the complete setup.

Discuss your inspection requirements
Tell Pacorr what you manufacture and what you need to inspect. Share a sample photograph, dimensions and reporting requirements to request a suitable configuration and quotation.