NA 027

DIN Standards Committee Optics and Precision Mechanics

About NAFuO

The DIN Standards Committee for Precision Mechanics and Optics (NAFuO) is responsible for standardization in

  • precision mechanics - including in healthcare technology,
  • microsystems technology,
  • optics and photonics
  • as well as jewellery and horology.  

The NAFuO also covers the biological evaluation and clinical investigation of medical devices, and tissue engineering. In the field of personal protective equipment, it is responsible for the standardization of personal eye protection, respiratory protective devices and diving equipment.

Most of the documents developed by the NAFuO are "harmonized" European Standards which give detail to the essential safety requirements laid down in European Directives. These harmonized standards are essential for placing products to the European market.

The Committee also aims at making as many standards as possible available at international level to reflect the global nature of these markets and to promote the global harmonization of approval procedures, particularly in the medical devices sector.

The NAFuO monitors all current developments in its areas of activity and is very open to new technologies and trends.

Feel free to contact us any time if you see the need to standardize a particular subject.

How is NAFuO composed?




DIN e. V.

Elisabeth Beck

Alexander-Wellendorff-Str. 2
75172 Pforzheim

Send message to contact  

New projects
Document number Begin Title
DIN EN 14458/A1 2019-07-22 Personal eye-equipment - High performance visors intended only for use with protective helmets More  Comment 
DIN EN ISO 12609-1 2019-07-22 Eye and face protection against intense light sources used on humans and animals for cosmetic and medical applications - Part 1: Specification for products (ISO/DIS 12609-1:2019); German and English version prEN ISO 12609-1:2019 More  Comment 
ISO/AWI 25539-4 2019-07-19 Cardiovascular implants - Endovascular devices - Part 4: Part 4: Application of ISO 17327-1 for coated endovascular devices More  Comment 

All projects  

Current Draft Standards
Document number Edition Title
DIN 58146 2019-09 Measuring method for the determination of solarization of optical glass fiber and bundles More  Read draft and comment
DIN 58189 2019-09 Fundamental standards for optics - Determination of focal length More  Read draft and comment
DIN ISO 14999-4 Beiblatt 1 2019-09 Optics and photonics - Interferometric measurement of optical elements and optical systems - Part 4: Interpretation and evaluation of tolerances specified in ISO 10110; Supplement 1 More  Read draft and comment

All draft standards  

Document number Edition Procedure Title
DIN ISO/TR 21477; DIN SPEC 13477 2018-08 Technical Report Optics and photonics - Preparation of drawings for optical elements and systems - Surface imperfection specification and measurement Systems (ISO/TR 21477:2017) More  Order from Beuth Verlag
DIN SPEC 58193 2017-08 Technical Report Spectacles and sunglasses - Critical substances potentially present in their materials More  Order from Beuth Verlag
DIN SPEC 58194 2015-12 VN Ophthalmic optics - Terms and definitions related to free-form technology; Text in German and English More  Order from Beuth Verlag


New standards
Document number Edition Title
DIN 58772 2019-09 Production in optical engineering - Coating rings - General requirements More  Order from Beuth Verlag
DIN EN ISO 9202 2019-09 Jewellery and precious metals - Fineness of precious metal alloys (ISO 9202:2019); German version EN ISO 9202:2019 More  Order from Beuth Verlag
DIN EN 13274-7 2019-09 Respiratory protective devices - Methods of test - Part 7: Determination of particle filter penetration; German version EN 13274-7:2019 More  Order from Beuth Verlag

All standards  

Documents withdrawn without replacement
Document number Deadline for comments Title
DIN 8274 2019-09-30 Jewels for fine mechanics; jewels with concave shape for watthour-meters More  Comment 
DIN 8237 2019-09-30 Gold alloy coverings on watch cases; requirements, testing and marking More  Comment 
DIN 13458 2019-10-31 Medical instruments - Ligature needle More  Comment 

All withdrawals  


DIN-Normenausschuss Feinmechanik und Optik

Außenstelle Pforzheim
Alexander-Wellendorff-Straße 2
75172 Pforzheim

Tel.: 07231 9188-0


Your way to NAFuO

The Offices of DIN Pforzheim are located at the borders of the City center.

Feinmechanik und Optik
Außenstelle Pforzheim
Alexander-Wellendorff-Str. 2
75172 Pforzheim
Tel.: 07231 9188-0


Your way to NAFuO

Main station (Hauptbahnhof), approx. 15 minutes walking distance to Alexander-Wellendorff-Straße. Leave the station platform and take Exit West towards city (Schmuckwelten). In the pedestrian underpass please keep left and follow the Bahnhofstraße continuing into the Leopoldstraße up to the bridge. After the bridge turn right and continue along the Jörg-Ratgeb-Straße, cross the street on to the Turnplatz. The DIN office is located to the right of the Wellendorff company. Taxi approx. 7 minutes, ca. 8 €.

Alternatively take the bus line 2 to Sonnenhof or line 8 to Rodrücken, approx. 10 minutes. Get off the bus at ”Turnplatz“ and cross the parking.

Coming from the autobahn A8 please take junction Pforzheim Nord (exit No 44). Continue along B294 (follow Heinrich-Wieland-Allee, Hohenzollernstraße, Christophallee) heading for the city centre. After passing the main railway station, turn off the B294 onto the Luisenstraße towards Brötzingen (i. e. at the petrol station ”Jet“ keep left). At the next set of lights turn left and follow the Berliner Straße up to the bridge. After the bridge turn right onto the Turnplatz. It is possible (except on Wednesdays) to park directly on the Turnplatz (parking fee).

The DIN office is located to the right of the Wellendorff company. Please note, if you use a navigation system, Turnplatz should be entered as destination, not Alexander-Wellendorff-Straße 2.

Free parking is available on the Messplatz. Please follow the corresponding inner city road signs.

From there, it is a 10 minute walk along the Enz (downstream direction) to the DIN Office.