Specialist Designs

Matthews spray droplet sizing reticle : NG30
Thomson pattern for dust analysis : G23
Chalkley point array : NG52
Pharmaceutical PSA pattern, IMA reticle (European Pharmacopoeia, USP 788) : G57
Soil analysis counting pattern (L G Briarty) : NG14
Lennox grain size analysis reticle : NG21
Kotter pattern : G48
Henning Reseau & Zeiss pattern integrating eyepiece reticle : G49,G47,G50

Graticules Optics now offer 20.4mm (Olympus), 24.5mm (Leica) and 25mm (Nikon, Meiji) diameter reticles at standard prices – no need to pay a premium price for a special size

Key Features

Eyepiece reticle with squares and scale to Thompson design

For counting particles in any of three areas. Squares are identified as A, B and C and are sized 4mm, 7mm and 10mm. Horizontal scale is 10mm length subdivided into 100 x 0.1mm divisions.

Key Features

Eyepiece reticle with 100 points

Pattern has 100 reference points marked on horizontal lines referenced as 1-10 on bottom and right side.

Key Features

Eyepiece reticle with Kotter pattern for analysis of bitumous coal and anthracite

This reticle is normally used with a 20x objective and is sized accordingly. If other objective magnifications are used then we have to apply a calibration factor to ensure the pattern is the correct size. Please supply details of objective magnification with all orders.

Key Features

Eyepiece reticle with 25 points on 6 horizontal lines

Key Features

Eyepiece reticle with 100 point integrating pattern

Slightly simplified version of G47 pattern

Key Features

Eyepiece reticle for particulate analysis in pharmaceutical applications

Pattern comprises large circle with small sized dots and circles, and horizontal scale. Often referred to as the Pharmaceutical PSA pattern, European Pharmacopeia pattern or IMA Reticle (USP 788)

Normally used on a microscope with 10x objective lens so that the main circle diameter equates to 1mm at the stage. If other objective magnifications are used then we will make a version with a special calibration factor. We recommend that the PS8 Micrometer Scale with UKAS certificate of calibration is also purchased to calibrate the G57 reticle and provide measurement traceability for ISO. Click on the link at the bottom of this page for more details.

Key Features

Eyepiece reticle for geological and soil analysis

Pattern comprises 10mm x 10mm square of 100 crosses in the form of a 10 x 10 array.

Key Features

Eyepiece reticle for Lennox grain size analysis

Pattern comprises and array of dashed squares and crosses.

Key Features

Eyepiece reticle with dots ranging from 50 to 400 microns

Matthews pattern is designed for the assessment of aerosol droplets. Pattern has 4 segments of dots with sizes of 50, 100, 200 and 400 microns.

Key Features

Eyepiece reticle with Chalkley Point pattern

A circle divided into quarters and populated with 25 points (dots). Used to quickly determine the relationship of components to each other using random sampling. See page 14 of eyepiece reticles catalogue for more information.