GB/T 2985-2008 English PDF (GBT2985-2008)

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GB/T 2985-2008: Biological microscope
GB/T 2985-2008 
GB
ICS 37.020
N 32
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 2985-1999
Biological microscope
生物显微镜
ISSUED ON. JULY 28, 2008
IMPLEMENTED ON. FEBRUARY 01, 2009
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Classification and basic parameters ... 6 
4 Requirements ... 7 
5 Test methods ... 13 
6 Inspection rules ... 26 
7 Marking, packaging, transportation and storage ... 27 
Foreword
This Standard replaces GB/T 2985-1999 Biological Microscope.
Main differences between this Standard and GB/T 2985-1999 are.
— Add performance requirements of photography and video system. And provide the
corresponding test methods.
— Electrical Safety Performance Requirements are developed according to the relevant
requirements of GB 4793.1-2007 Safety Requirements For Electrical Equipment For
Measurement, Control, And Laboratory Use - Part 1. General Requirements. The
test methods are also specified correspondingly.
— The requirements to four technical indicators - "objectives aberration correction and
clear vision", "requirements for condenser", "revolving nosepiece positioning error"
and "fine tuning mechanism backlash" in the previous version are changed from
“reference to other relevant standards” to “specific indicator requirements”.
— The mechanical tube length of universal microscope was modified to 160 mm or ∝.
— The fit dimension of eyepieces and objectives tube of the universal microscope is
modified to ϕ23.2 ி଼௛଼ .
— The magnification tolerance of objectives and eyepieces of microscope is modified
to ± 5%.
— There is no specific provisions for models of Test Tool SY-1 type bacterial inspection
slide, and SY-2 type blood cell inspection slide. That is, delete SY-1 type and SY-2
type.
— Modify the Test Tool 600 lines/mm grid grating to 600 lines/mm grating.
— Delete the sampling plan of type inspection in inspection rules.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee (SAC/TC
103) on Optics and Photonics of Standardization Administration of China.
Drafting organizations if this Standard. University of Shanghai Science and Technology,
Ningbo Yongxin Optics Co., Ltd., Ningbo Teaching Instrument Co., Ltd., Ningbo Huaguang
Precision Instrument Co., Ltd., Wuzhou Oka Optical Instrument Co., Ltd., Ningbo Sunny
Instruments Co., Ltd., Guangzhou Liss Optical Instrument Co., Ltd., Nanjing Jiangnan
Novel Optics Co., Ltd., Motic China Group Co., Ltd., and Phenix Optics Co., Ltd.
Participating organization of this Standard. Chongqing Photoelectric Instrument Co., Ltd.
The main drafters of this Standard. Huang Weijia, Hu Yu, Mao Lei, Wang Guorui, Xu Liming,
Zhang Jinghua, Shen Xiaojiang, Li Migao, Li Xi, Xiao Qian, and Wu Guotong.
The previous versions replaced by this Standard are as follows.
— GB 2985-1982, GB 2985-1991, GB/T 2985-1999.
Biological microscope
1 Scope
This Standard specifies the classification, basic parameters, requirements, test methods,
inspection rules, marks, packaging, storage and transportation of biological microscope
products.
This Standard applies to various types of biological microscopes, observed in visible light,
with mechanical tube length of 160 mm or infinite.
This Standard applies to various types of biological microscopes (hereinafter referred to as
the microscope) that adopt photography and video technology to perform the image
viewing and processing.
2 Normative references
The articles contained in the following documents have become part of this Standard when
they are quoted herein. For the dated documents so quoted, all the modifications
(excluding corrections) or revisions made thereafter shall not be applicable to this Standard.
For the undated documents so quoted, the latest editions shall be applicable to this
Standard.
GB/T 2609 Microscopes - Objectives
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1. Sampling
schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T
2828.1-2003, IDT ISO 2859-1.1999)
GB/T 9246 Microscopes - Oculars (eyepieces)
GB/T 9247 Microscopes - Condensers
GB/T 15464 General-purpose specification for the packaging of instrumentation
products
GB/T 22055.1 Microscopes - Screw threads for objectives and related nosepieces -
Part 1. Screw thread type RMS (4/5in×1/36in) (GB/T 22055.1-2008, IDT ISO 8038-
1.1997)
GB/T 22056 Microscopes - Marking of objectives and eyepieces (GB/T 22056-2008,
MOD ISO 8578.1997)
GB/T 22057.1 Microscopes - Imaging distances related to mechanical reference planes
c) Laboratory microscope. Not more than 0.004 mm;
d) Research microscope. Not more than 0.002 mm.
4.11 The allowable difference of magnification of microscope objectives shall not exceed ±
5%.
4.12 The allowable difference of magnification of microscope eyepieces shall not exceed
± 5%.
4.13 For the microscope with tilting eyepieces sleeve, when the eyepieces sleeve rotates
for 360°, the center displacement of the image on the eyepieces focal plane shall not be
more than 0.6mm.
4.14 The optical axis of the lighting system and observation system shall be consistent; the
lighting in the field shall be uniform, without the phenomenon of one light side and one dark
side or light barring. When the condenser rises to the highest position, the top of the
condenser shall be below the surface of the stage from 0.03mm to 0.4mm.
4.15 The dark field condenser shall be evenly illuminated. When there is no specimen
placed on the stage, the dry type dark field condenser's field shall be basically dark;
background of immersion type dark field condenser's field shall be relatively dark;
specimen under observation shall be clear and sufficiently bright.
4.16 There shall be reliable sealing measures for immersion bright field condenser and
immersion dark field condenser.
4.17 Microscope binocular system performance
4.17.1 The difference of the magnification of two systems on the left and right sides of the
binocular microscope shall comply with the following requirements.
a) When the field angle of the eyepieces does not exceed 50°, it is not more than 2.0%.
b) When the field angle of eyepieces exceed to 50°, it is not more than 1.5%.
4.17.2 The spectrum color of two systems on the left and right sides of the binocular
microscope shall be basically same. The difference of the light and dark shall not be more
than 18%.
4.17.3 The azimuth difference of the field image plane shall not more than 40’ of the two
systems on the left and right sides of the binocular microscope.
4.17.4 Within the scope of 55mm - 75mm of the binocular pupil distance, the center
deviation of the left and right field shall comply with the following requirements.
a) Up and down. 0.2mm；
b) Right and left external sides. 0.2mm；
c) Right and left internal sides. 0.4mm.
4.17.5 Outgoing beam coming from the left and right of the binoculars sleeve shall be in
the parallel condition. The measurement shall be conducted at any position within the
scope of the pupil distance of 55-75mm. And the permissible deviation of parallel shall
comply with the following requirem...