Aims of the UME Optical Standards Laboratory (OSL) are: to develop primary level optical standards, realize scales, provide traceability distribution throughout country based on SI units, develop optical measurement methods in the area of technology and give maximum support to institutions in the field of industry, academy and research by using measurement techniques and standards. In these aspect, in order to provide international convenience of realized scales laboratory participates in comparisons with other metrology institutes in the world and makes research and development activities to give measurement/calibration, education and consultancy services in field of Radiometry, Photometry, Spectrophotometry and Fiber Optics.
WORKING AREAS
The laboratory is established in the year of 1992. Since then OSL is participating in the areas of Radiometry, Photometry, Spectrophotometry and Fiberoptics to share its scientific and technological knowledge base by means of cooperation programs with the national industry.
1.RADIOMETRY DIVISION
The definition of radiometric measurements include the measurements between X-ray and radio waves regions of electromagnetic spectrum, called optical radiation interval and cover the wavelength range from 1 nm to 10 6.
The primary standard of the laboratory is the helium-cooled Electrical Substitution Cryogenic Radiometer. It is possible to measure laser sources absolute optical power. Measured optical power is transferred to working standards with OSL made reflective type trap detectors (TD), OSL made filter radiometers (FR), pyroelectric radiometer (PR) and thermopiles (TP) to establish scales like spectral irradiance and responsivity.
Many radiometric properties of materials and devices that are used in the health care, defense, chemistry and metallurgy industries can be determined in accordance with national or international standards like EN, ISO, IEC, TSE etc. UV exposure conformity measurements of light sources and detectors or determination of spectral power distributions of IR sources can be shown as examples for this area.
Primary Level Cryogenic Radiometer
Reflection Type Trap Detectors
Spectral Irradiance Measurement System
Temperature-Controlled Fitler Radiometer
2.PHOTOMETRY DIVISION
Photometric measurements contains all measurements that can be sensed by the human eyes between 380 nm and 780 nm wavelength range.
Candela (cd) is one of the 7 SI base units. The tracebility chain is established by realizing Candela according to the 1979 year definition by means of detector-based approach. Derivate photometric quantities like illuminance (lux) or luminance (cd/m 2) can be measured by using calibrated photometer heads and luminance sources. Luminous flux (lumen) measurements, which are another important photometric quantity for light sources, are carried out with the 2 m integrating sphere. In the Photometry Division, especially lighting properties of light sources (halogen, LED, fluorescence) are taken into account.
This section contains aspects where lightning techniques or light sources used: mainly applications in the automotive, dye, defense, advertising and textile industries are covered by this section. Retroreflectors, flashing signal lamps and LED based traffic sign measurements are carried out in conformity with national and international measurement standards.
Luminous Intensity Measurement System
Luminous Flux Measurement System
Luminous Intensity and Retroreflection Measurement System
3.SPECTROPHOTOMETRY DIVISION
The properties of materials that interact with light through transmission, specular or diffused reflection, absorption, scattering or refraction are measured based on a double monochromator measurement system.
Spectrophotometric measurements are performed mainly in applications of the dye, defense, health care, drug, textile and automotive industries.
The calibration of filter sets used for UV-VIS-IR Spectrometers, on site calibration of UV-VIS spectrophotometers, glossiness measurements (20°, 60°, 85°) , color measurements or calibrations (0°/45°, 45°/0°, d/8°, 8°/d) of light sources or materials, color temperature measurements, wavelength measurements of LED’s, laser or spectral lamps, reflection, transmission, absorbtion and refractive index measurements are performed in this section.
Optical Characterization System Based on Double-Monochromator System
Measurement System for Definig of Refractive Indeces of Liquids or Glasses
4.FIBER OPTIC DIVISION
The traceabilities in fiber optic measurements are established by the cryogenic radiometer and UME FZF (Time & Frequency) laboratory.
Fiber optic power meters, attenuators and OTDR’s that are important components in the area of telecommunication, defense and information technologies applications can be measured and calibarated by using national fiber optics standard loops and calibrated sphere radiometers. Also the fiber optic division covers calibration, test and characterization studies of single mod fiber cables.
Characterization Set-up for Fibers
Measuremet Set-up for Fiber Optic Power
FUTURE PROSPECTS
Establishment of a goniophotometric measurement system that measures distribution of light intensity and luminous flux of light sources .
Establishment of the high-power (above 10 W) measurement system and enlargement of calibration service in this area.
Providing the calibration services with low uncertainties for light sources and detectors that are working in the UV-B region (between 280-310 nm wavelength range).
Establishment of the spectroradiometric measurement system for the calibration of detectors up to 20,8 µm.
Establishment of standards and analyzing of multi mode fiber optics and providing calibration services in this area.
MEASUREMENT AND CALIBRATION FACILITIES
Measurements and calibrations based on metrological purposes can be divided in four groups at the Optics Standards Laboratoray:
Laboratory with the established background and experiences in the field of optical metrology offer the services to the industrial needs in the scope of education, counseling and bilateral work. At four different subject the standard and special trainings given twice a year are shown below.
- Device to be used, Measurement principles and calibrations
2 day
G1OP/FO040
- Fiber Optic (Power, Attenuation, Loss, Length)
- Device to be used, Measurement principles and calibrations
2 day
G1OP
Private trainings depend on request
2 day
DIRECTED TO RESEARCHES UPON THE REQUEST CONSTRUCTED EQUIPMENTS
Laboratory basically projected the formed standards, devices aimed to use in research and usage.
Device
Feature
Usage Intension
Trap Detector (250 nm -1600 nm)
An absolute detector consisting of special design photodiodes.
Performing of spectral responsivity calibration of detectors
Measurements of output powers of lasers and laser diodes at the mentioned wavelengths
Filter Radiometer (250 nm -1100 nm)
Temperature controlled radiometer consists of trap detector and filter sets.
Measurement of spectral irradiance values of every types of light sources
Photometer Head and Luxmeter
Device consists of special design single Si photodiode, V( l ) filter, entrance aperture and temperature control unit.
Measurement of photometric quantities of every types of light sources such as luminous intensity, illuminance and luminance
Irradiance Standard Lamp (250-2500 nm)
A halogen light source with tungsten filament, current controlled
Calibration of irradiance-meters and photometers.
Single Photodiode Detectors (Si, Ge, InGaAs)
Detector consisting of single photovoltaic quantum detector, removable/ detachable entrance aperture and temperature control unit
Realization of spectral responsivity scale within 250 nm - 1700 nm
Measurement of optical output power of laser and laser diodes within the mentioned wavelength range
Single Mode Optical Fiber Length and Loss Standard
Single Mode Optical Fiber standard the spectral attenuation coefficient of which is determined in a range of 1280 nm to 1570 nm according to IEC 793-1 and the length of which is measured according to IEC proposals.
Calibration of loss scales of OTDRs in single mode
Calibration of length scales of OTDR equipments via Recirculating Delay Line Method
Standard refractive index liquids
Chemical liquids having refractive indexes changing from 1.3 to 1.7.
Calibration of Abbe refractometers
Special design
Optical solutions to be produced upto request
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These devices are supplied with calibration certificate.
TRACEABILITY CHAIN
The primary standard of UME Optical Standards Laboratory is the Electrical Substitution Cryogenic Radiometer. After realization of absolute optical power scale in 2003 depending on this primary radiometer facility the traceabilities of all detector based radiometric, photometric and fiber optics quantities were established depending on the UME power scale. Traceability chains that were established related to these scales have been confirmed and developed with participated international comparisons.
Traceability Chain in Radiometric Measurements
Traceability Chain in Photometric Measurements
Traceability Chain in Spectrophotometric Measurements
Traceability Chain in Fiber Optic Measurements
PUBLICATION LIST
1
M.Haciyeva. “Realization of Candela at UME ”, I. Ölçüm-Bilim Kongresi, Eskişehir-Türkiye, Ekim, 1995 (in Turkish).
2
İ.Mamedbeyli, Z.Ürey. “Regular reflectance and polarization effects of light source in gloss measurements”. II. Ölçüm-Bilim Kongresi, Eskişehir-Türkiye, Ekim, 1997 (in Turkish).
3
İ.Mamedbeyli, Z.Ürey, A.K.Türkoğlu. “Transfer of photometric quantities at arbitrary distribution temperatures”, Turkish Journal of Physics, 22 (1998), pp. 841 - 850.
4
A.K.Türkoğlu, U.Küçük. “Measurement of light”, Üretimde Kalite, Aralık, 1998 (in Turkish).
5
A.K.Türkoğlu, F.Samadov, M.Durak, U.Küçük. “Optical test and measurement position in automotive sector”, III. Ulusal Ölçümbilim Kongresi, Eskişehir-Türkiye, Ekim, 1999, pp.140-145 (in Turkish).
6
U.Küçük, A.Kamuran Türkoğlu, F.Samadov. “Determination of color properties of material using surface reflectance information” III.Ulusal Ölçümbilim Kongresi, Eskişehir-Türkiye, Ekim, 1999, pp.341-344 (in Turkish).
7
F.Samadov, M.Durak, A.Kamuran Türkoğlu. “Illuminance and Luminance”, III. Ulusal Ölçümbilim Kongresi, Eskişehir-Türkiye, Ekim, 1999, pp.21-28 (in Turkish)
8
M.Durak, F.Samadov, A.Kamuran Türkoğlu. “Measurement principles of irradiance in ultraviolet region”, III. Ulusal Ölçümbilim Kongresi, Eskişehir-Türkiye, Ekim, 1999, pp.119-123 (in Turkish)
9
A.K.Türkoğlu, F.Samadov, M.Durak. “Subtraction of surface map of silicon fotodiodes”, 2. Ulusal Elektro-Optik Çalışma Grubu Toplantısı. 2000, Koç Üniversitesi, İstanbul (in Turkish)
10
A.K.Türkoğlu, F.Samadov, M.Durak, U.Küçük. “Construction of a reference photometer head for the realization of candela”, CIE midterm meeting, Istanbul-Turkey, 2001, pp.379-386.
F.Samadov, M.Durak, A.K.Türkoğlu.”Measurements of 0/45 diffuse reflectance of reflection standards by using of a spectrophotometer”, CIE midterm meeting, Istanbul-Turkey, 2001, pp.433-437.
13
N.F.Kahramanov, S.R.Samedov, S.S.Sadulova, F.S.Samedov. “Photoelectric phenomena in Au3In5Se9 and Au3Ga5Se9 compounds”, Intern. Journal of Infrared and millimeter waves. Vol.22, No:6, 2001, pp.871-885.
14
M.Durak, F.Samadov, A.K.Türkoğlu. “Luminous flux measurements of fluorescent lamps”, TMMOB Elektrik Mühendisleri Odası İzmir Şubesi, Aydınlatma Sempozyumu ve Sergisi, İzmir-Türkiye, Eylül, 2001, pp .154-158 (in Turkish).
15
M.Bilsel, F.Samadov, A.K.Türkoğlu. “Length and power attenuation measurements in fiber optics communication lines”, I.Ulusal İletişim Teknolojileri Sempozyumu ve Fuarı. Ankara-Türkiye, Ekim 2001 (in Turkish).
16
U.Küçük, A.K.Türkoğlu “Standard Gloss Measurements”, TMMOB Kimya Mühendisleri odası İstanbul şubesi, IV. Uluslararası Boya, Vernik, Mürekkep ve Yardımcı Maddeler Sanayi Kongresi ve Sergisi, Istanbul-Türkiye, Kasım 2001, pp. 121-126 (in Turkish).
17
F.Samadov, M.Durak, A.K.Türkoğlu. “Standard spectrophotometric color measurements”, TMMOB Kimya Mühendisleri odası İstanbul şubesi, IV. Uluslararası Boya, Vernik, Mürekkep ve Yardımcı Maddeler Sanayi Kongresi ve Sergisi, Istanbul-Türkiye, Kasım 2001, pp.137-145 (in Turkish).
18
M.Durak , F.Samadov, A.K.Türkoğlu. “Optical Characterization of silicon photodiodes”, 3. Ulusal Elektro-Optik Çalişma Toplantısı. Kasım 2001, Aselsan, Ankara (in Turkish).
19
M.Durak, F.Samadov, K.Türkoğlu ‘Spatial non-uniformity measurements of large area silicon photodiodes.’ Tr. Journal of Physics, 2002, Vol.26, No:5, pp.375-379.
20
Ö.Bazkır, S.Uğur, F.Samadov, A.Esendemir (ODTÜ). “Cryogenic radiometer based absolute optical power measurements and characterization of trap detectors”, 4. Ulusal Elektro-Optik Çalışma Grubu Toplantısı. Aralık, 2002, Kocaeli-Türkiye (in Turkish).
21
U.Küçük, K.Türkoğlu. “Standard gloss measurements”, Kimya Teknolojileri dergisi, No:22, 2002, pp. 46-49 (in Turkish).
22
F.Samadov, M.Durak, K.Türkoğlu. “Standard spectrophotometric color measurements”. Kimya Teknolojileri dergisi, No:23, 2002, pp .60-64 (in Turkish).
23
F.Samadov, M.Durak, K.Türkoğlu. “Photometric characterizations of light emitting diodes”. 2 nd Balkan Conference and Fair in Lighting, 2002, Istanbul , Turkey
24
M.Durak, F.Samadov, K.Türkoğlu. “Establishment of national photometric scale and traceability chain”, 4. Ulusal Aydınlatma Kongresi. 2002, İstanbul, Türkiye (in Turkish).
25
F.Samedov, M.Durak. “Optical measurement and calibrations in metrological scope”, V.Ulusal Ölçümbilim Kongresi, Eskişehir-Türkiye, Ekim 2003 (in Turkish).
26
M.Durak, K.Türkoğlu, F.Samadov. “Construction of a reference filter radiometer for the spectral irradiance measurements”, V .Pasific Lasers and Electro-Optics conference, Taipei-Taiwan, December, 2003
27
F.Samedov, M.Durak. “Realization of luminous flux unit of lumen at UME ”, Optica Applicata, Vol: 34 No:2, 2004, pp. 265-274.
28
M.Durak, F.Samadov. “Detector based calibration of ultraviolet solar radiometers”, Güneş Enerjisi Sistemleri Sempozyumu, Mersin-Türkiye, Haziran, 2003 (in Turkish).
29
M.Durak, M.H.Aslan. “Optical characterization of the silicon photodiodes for the establishment of national radiometric standards”, Optics & Laser Technology, No: 3, 2004, pp.223-227
30
M.Durak, Ö.Bazkır, F.Samedov. “Improvements in the optical measurements using laser stabilization optics”, IMEKO 16 th Symposiom on Photonics in Measurement, Germany , 2004.
31
F. Samadov, A.K. Türkoğlu, Y.Çalkın. “Establıshment of temperature-controlled reference LED’s and characterization of its optical properties”, CIE “Expert Symposium on LED Light Sources, Japan , 2004.
32
F.Samedov, O.Çelikel, Ö.Bazkır, M.Durak. “The establishment of measurement system directed to determine the photometric properties of retroreflective materials”, V. Ulusal Aydınlatma Kongresi, 2004 (in Turkish).
33
M.Durak, O.Çelikel, Ö.Bazkır, F.Samedov. “Measurement and calibrations in ultraviolet region”, V. Ulusal Aydınlatma Kongresi, 2004 (in Turkish).
34
Ö.Bazkır, F.Samedov. “Electrical substitution cryogenic radiometer based spectral responsivity scale between 250-2500 nm wavelengths”. Optica Applicata, Vol.34, No:3, pp.427-438, 2004.
35
M.Durak, O.Çelikel, Ö.Bazkır, F.Samedov. “Establishment of CCD camera based laser intensity stabilization system in the infrared region”. SPIE Semposium on Photonics, China, 2004.
36
M.Durak, F.Samedov. “Realization of a filter radiometer based irradiance scale with high accuracy in the region from 286 nm to 901 nm”. Metrologia, Vol.41, No:12, pp.401-406, 2004.
37
F.Samedov, U.Küçük, Y.Çalkın. “Computer-controlled refractive index measurement system working on laser displacement technique”. 6. Ulusal Optik, Elektro-Optik ve Fotonik Çalışma Grubu Toplantısı, Sabancı Üniversitesi, İstanbul, 2004 (in Turkish).
38
M.Durak, A.K.Türkoğlu, F.Samedov. “Construction of reference filter-radiometer for spectral irradiance measurement”. 6. Ulusal Optik, Elektro-Optik ve Fotonik Çalışma Grubu Toplantısı, Sabancı Üniversitesi, İstanbul, 2004 (in Turkish).
39
Ö.Bazkır, F.Samedov. “Characterization of silicon photodiode based trap detectors and establishment of spectral responsivity scale”. Optics and Lasers in Engineering, Vol.43, No:2, pp.131-141, 2005.
40
Ö.Bazkır, S.Uğur, F.Samedov, A.Esendemir. “High-accuracy optical power measurements by using electrical - substitution cryogenic radiometer”, Optical Engineering, Vol.44, pp.1-6, 2005.
41
Oğuz Çelikel, Mehmet Küçükoğlu, Murat Durak, Farhad Samedov. “Determination of attenuation coefficients of single mode optical fibers to be used in OTDR calibrations”, Optics & Laser Technology, Vol.37(5), pp.420-426, 2005.
42
F.Samedov, Ö.Bazkır. “Realization of Photometric Base Unit of Candela Traceable to Cryogenic Radiometer at UME”. European Physical Journal of Applied Physics, Vol.30(3), 205-214, 2005.
43
A.K.Türkoğlu, F.Sametoğlu, Y.Çalkın, U.Küçük. “Standard Photometric Tests and Measurements Needed for Automotive Industry”, IX.Otomotiv ve Yan Sanayii Sempozyumu, Bursa, S60-63, 2005 (in Turkish).
44
O.Celikel, O.Bazkir, M.Kucukoglu, F.Samedov. “Cryogenic radiometer based absolute spectral power responsivity calibration of integrating sphere radiometer to be used in power measurements at optical fiber communication wavelengths”, Optical and Quantum Electronics, Vol. 37(6), 529 - 543, 2005.
45
O.Celikel. “Mode field diameter and cut-off wavelength measurements of single mode optical fiber standards used in OTDR calibrations”, Optical and Quantum Electronics, Vol. 37(6), 587-604, 2005.
46
F. Samedov, M. Durak, O. Bazkir. “Filter-radiometer based realization of Candela and establishment of photometric scale at UME”, Optics and Lasers in Engineering, 43(11), 1252-1256, 2005.
47
F.Sametoglu, O.Celikel. “Establishment of spectrophotometric standards based on InGaN white LED’s”, 20th Congress of the International Commission for Optics, SPIE Proceedings, Vol.6033, China, 2005.
48
Y.Çalkın, A.K.Turkoglu, F.Sametoglu. “ Dedector based luminance and illuminance measurements at UME”, Optics and Optoelectronics, SPIE Proceedings, Poland, 2005.
49
F.Sametoglu, U.Kucuk, Y.Calkin. “Determination of refractive index of liquids and glasses using developed computer controlled laser displacement method”, Optics and Optoelectronics, SPIE Proceedings, Poland, 2005.
50
F.Samedov, O.Celikel, O.Bazkir. “Characterization of Retroreflecting Materials Using Designed Retroreflection Measurement Sistem”, Luxeurope Proceedings, Germany, 2005.
51
M.Durak, F.Samedov. “Establishment of high illimunance calibration facility at UME”, Luxeurope Proceedings, Germany, 2005.
52
F.Samedov, O.Celikel, O.Bazkir. “ Establishment of a computer-controlled retroreflection measurement system at the National Metrology Institute of Turkey (UME)” Review of Scientific Instruments, 76(9), 2005.
53
F.Sametoglu, O.Bazkir, O.Celikel. “Detector Based Traceability Chain Established at the UME ” NewRad Conference, Davos, 2005.
54
A.K.Türkoğlu. “Characterization of Thermopile for Laser Power Measurements” NewRad Conference, Davos, 2005, Davos, 2005.
55
M.Durak, F.Sametoğlu. "Optical Characterization of GaP and GaAsP Photodiodes” NewRad Conference, Davos, 2005, Davos, 2005.
56
J. Envall, L. Ylianttila, H. Moseley, A. Coleman, M. Durak, P. Kärhä, E. Ikonen. “Investigation of comparison methods for UVA irradiance responsivity calibration facilities”, 6 th Workshop on Ultravıolet Radıatıon Measurements, Davos, 2005.
57
A.Pons, J.Campos, A.Corróns, F.Samedov. “Key Comparison EUROMET.PR-K3.b.1: Bilateral comparison on illuminance responsivity between IFA-CSIC/Spain and UME/Turkey”, Metrologia, 2005, 42, Tech. Suppl., 02002.
58
K.Türkoğlu, Y.Çalkın, F.Sametoğlu. “Standard Optical Tests of Traffic Lights” TMMOB Elektrik Mühendisleri Odası III.Aydınlatma Sempozyumu, Ankara, 2005 (in Turkish).
59
M.Durak, F.Samedov. “Calibration of Radiometers Used in Irradiance Measurements”. VI. Ulusal Ölçümbilim Kongresi. Eskişehir, 2005 (in Turkish).
60
A.K.Türkoğlu. “Kalibrasyon periyodu neye göre belirlenir?” VI. Ulusal Ölçümbilim Kongresi. Eskişehir, 2005 (in Turkish).
61
O.Çelikel, F.Samedov.”OTDR cihazlarının kalibrasyonunda kullanılan tek modlu optik fiber standartların oluşturulması” VI. Ulusal Ölçümbilim Kongresi. Eskişehir, 2005 (in Turkish).
62
F. Samedov. “Laser-based optical facility for determination of refractive index of liquids”, Optics & Laser Technology, 38 pp 28-36, 2006.
63
Özcan Bazkır, Oğuz Çelikel, Farhad Samedov. “Realization of relative responsivity scale with the elctrically calibrated pyroelectric radiometer”, Optics & Laser Technology (kabul edilmiştir), 2006.
LABORATORY ENVIRONMENTAL CONDITIONS
Temperature
23,0°C ± 1,0°C
Relative Humidity
% 45 ± % 10
Laboratory Area
468 m 2
Other Properties
Positive Pressure, Filtered Air, Private Entrance Rooms, Mat Black Painted Walls
