GB/T 22055-2022 in English

VALID

Microscopes—Interfacing dimensions for imaging componen

Issued on:2022-04-15
Implemented on:2022-11-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $280.00
$272.00

Standard No:	GB/T 22055-2022
Document status:	VALID
Title in English:	Microscopes—Interfacing dimensions for imaging componen
Title in Chinese:	显微镜成像部件的连接尺寸
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2022-04-15
Implemented on:	2022-11-01
Superseding:	GB/T 22055.1-2008 Microscopes - Screw threads for objectives and related nosepieces - Part 1: Screw thread type RMS (4/5in×1/36in) GB/T 22055.2-2008 Microscopes - Screw threads for objectives and related nosepieces - Part 2: Screw thread type M25×0.75mm GB/T 22057.1-2008 Microscopes - Imaging distances related to mechanical reference planes - Part 1: Tube length 160mm GB/T 22057.2-2008 Microscopes - Imaging distances related to mechanical reference planes - Part 2: Infinity-corrected optical systems GB/T 22132-2008 Microscopes - Diameter of interchangeable eyepieces
ICS Classification:	37.020-Optical equipment
Professional Classification:	GB-National Standard
Related Keywords:	m25 thread system objective lens-tube lens distance tube length system matching tube lens objective lens
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《GB/T 22055-2022显微镜成像部件的连接尺寸》由TC103（全国光学和光子学标准化技术委员会）归口，TC103SC2（全国光学和光子学标准化技术委员会显微镜分会）执行，主管部门为中国机械工业联合会。

Introduction

Background of Standard Revision and Technological Evolution

GB/T22055-2022 integrates the 5 independent standards of the 2008 version (GB/T22055.1/2, GB/T22057.1/2, GB/T22132). The main technological evolutions include:

Improvement Dimensions	2008 Version of the Standard	2022 Version of the Standard
Thread Specifications	RMS/M25 Only	Newly Added W26/M27/M32
Parfocal Distance	Fixed at 45mm	Extended to 35/95mm options
Tolerance system	International tolerance	Adapt to domestic processing requirements

Core parameter analysis

1. Key dimensions of objective lens connection

The standard defines the new value range of objective lens parfocal distance (l₁):

Basic value: 45±0.2mm (NA≤0.1)
Extended value: 35/95mm (special application scenarios)

Cover glass thickness compensation formula: l_CG=l₁+t(n-1)/n, where t is thickness and n is refractive index (see Appendix B)

2. Thread interface specifications

Thread type	Nominal diameter (mm)	Thread length (mm)	Applicable scenarios
RMS	20.32	5.0	Traditional biological microscope
M25	25.0	5.0	Industrial Inspection Equipment
M32	32.0	5.0	Large NA Objectives

Implementation Suggestions

Compatibility Solutions for Old and New Systems

For users upgrading to a 160mm tube length system:

45mm parfocal distance objectives are preferred
Check the thread type of the converter (RMS/M25 requires an adapter)
Note that the infinity system requires a matching tube lens (f_NTL=150-250mm)