Graticules Optics Microscope Eyepiece Reticles

顆粒大小 & 分佈

Particle Sizing & Distribution

 

 

帕特森(Patterson) 顆粒 & 圓形規範
NE50
NG1
Porton 顆粒 & 圓形規範
NG2 NG12  

NG2

(原始格式)

NG12

(進階格式)

英式標準標線 & 圓形規範
  NG10
NG10
觀察標線
NG5
NG5

 

 


NG1 PATTERSON GLOBES & CIRCLES

Eyepiece reticle with globes, circles and ruled grid for particle sizing and counting The reticle pattern consists of a central rectangle, subdivided into 9 smaller rectangles with a number of circles and dots (globes) along the top and bottom edges. Each circle is marked with the diameter in units, 250 units being the length of the large rectangle. Rectangle size is nominally 4.5mm x 2.025mm and circle/dot sizes in microns are nominally 450, 360, 270, 225, 180, 145, 110, 74, 37 and 18.

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Pattern 

Description

Diameter 

Order code

NG1

Paterson Globes/Circle

16mm

01B16250

 

Specify diameter on all orders

19mm

01B19250

 

 

20.4mm

01B20.4250

 

 

21mm

01B21250

 

 

23mm

01B23250

 

 

24mm

01B24250

 

 

24.5mm

01B24.5250

 

 

25mm

01B25250

 

 

26mm

01B26250

 

 

27mm

01B27250

 

 

Others

 

 


NG10 BRITISH STANDARD GLOBES/CIRCLES RETICLE

Eyepiece reticle designed to satisfy requirements of BS3625/BS3260

Pattern comprises globes (dots) and circles of increasing size along the top and bottom edges of a divided rectangle. Designed for measuring particle size in the range 150 to 0.38 micron. Circles and globes have nominal sizes in microns of 560, 400, 280, 200, 149, 100 and 70. Circle 1 is defined as 1 unit.

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Pattern 

Description

Diameter 

Order code

NG10

British Standard Globes & Circles BS 3625

16mm

01B16252

 

Specify diameter on all orders

19mm

01B19252

 

 

20.4mm

01B20.4252

 

21mm

01B21252

 

 

23mm

01B23252

 

 

24mm

01B24252

 

 

24.5mm

01B24.5252

 

 

25mm

01B25252

 

 

26mm

01B26252

 

 

27mm

01B27252

 

 

Others

 

 


NG12 MODIFIED PORTON GLOBES & CIRCLES

Eyepiece reticle with globes, circles and ruled grid for particle sizing and counting

This modified version of the Porton reticle now has the globes and circles inside the expanded rectangular grid section, for improved traverse analyses.

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Pattern 

Description

Diameter 

Order code

NG12

New Porton Pattern Globe & Circles

16mm

01B16253

 

Specify diameter on all orders

19mm

01B19253

 

20.4mm

01B20.4253

 

21mm

01B21253

 

 

23mm

01B23253

 

 

24mm

01B24253

 

 

24.5mm

01B24.5253

 

 

25mm

01B25253

 

 

26mm

01B26253

 

 

27mm

01B27253

 

Others

 

 


NG2 ORIGINAL PORTON RETICLE

The circle/dot areas and right-hand side rectangle divisions increase with Root 2 progression. All elements are numbered for reference. The rectangle is 4.5mm x 2.025. The specimen is racked on the stage of the microscope and traverses are taken right across the deposit sizing all the particles encountered.

Reference: K.R.May, Journal of Scientific Instruments Vol. 22 Oct 1945. 'The Cascade Impactor, An Instrument for Sampling Coarse Aerosols'.

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Pattern 

Description

Diameter 

Order code

NG2

Original Porton Globes/Circle

16mm

01B16251

 

Specify diameter on all orders

19mm

01B19251

 

20.4mm

01B20.4251

 

 

21mm

01B21251

 

 

23mm

01B23251

 

 

24mm

01B24251

 

 

24.5mm

01B24.5251

 

 

25mm

01B25251

 

 

26mm

01B26251

 

 

27mm

01B27251

 

 

Others

 

 


NG5 FAIRS RETICLE

Eyepiece reticle designed to extend the sizing range of the globe & circle reticles

A series of concentric circles with Root 2 progression and divided square that can be used in conjunction with, for example, the NG2.

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Pattern 

Description

Diameter 

Order code

NG5

Fairs

16mm

01B16077

 

Specify diameter on all orders

19mm

01B19077

 

20.4mm

01B20.4077

 

 

21mm

01B21077

 

 

23mm

01B23077

 

24mm

01B24077

 

 

24.5mm

01B24.5077

 

 

25mm

01B25077

 

 

26mm

01B26077

 

 

27mm

01B27077

 

 

Others

 

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