Abstract

Large relative aperture three- and four-objective multipass matrix systems ensuring the longest optical path length in an absorbing medium have been developed for high resolution laser spectroscopy. In these systems the images are formed on the field mirrors as compact rectangular matrices with a controlled amount of lines and columns. The number of passes may reach 500 for mirrors with high reflectivity layers. Having a simple construction, the matrix systems provide high optical and operational features. In view of their capacities the matrix systems are new generation multipass systems.

© 1991 Optical Society of America

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References

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  1. MIRAN, Portable Ambient Air Analyzers, Foxboro/Wilks, Inc., Printed in USA (1980).
  2. G. P. Semenova, V. G. Vorobyev, Yu. D. Pushkin, “An Attachment to Spectrophotometer to Measure the Absolute Values of High Reflection Coefficients,” Opt. Mekh. Prom. 4, 78–79 (1976), in Russian.
  3. O. Arnon, P. Baumeister, “Versatile High-Precision Multiple-Pass Reflectometer,” Appl. Opt. 17, 2913–2916 (1978).
    [CrossRef] [PubMed]
  4. D. E. Edwards, P. Baumeister, “Multiple-Pass Reflectometer,” Appl. Opt. 20, 3968–3971 (1981).
  5. R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.
  6. R. L. Fork, F. A. Beisser, D. K. Fork, “Multipass Optical Amplifier Using a Double Confocal Resonator Geometry,” Rev. Phys. Appl. 22, 1665–1671 (1987).
    [CrossRef]
  7. I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.
  8. F. Shimizu, H. Shwe, T. Tamayama, “Stark Spectroscopy by 10-μ Lasers Using a Multipath Cell,” J. Appl. Phys. 46, 258–259 (1975).
    [CrossRef]
  9. J. Shewchun et al., “Pollution Monitoring Systems Based on Resonance Absorption Measurements of Ozone With a ‘Tunable’ CO2 Laser: Some Criteria,” Appl. Opt. 15, 340–346 (1976).
    [CrossRef] [PubMed]
  10. J. Reid, J. Shewchun, B. K. Garside, E. A. Ballik, “High Sensitivity Pollution Detection Employing Tunable Diode Lasers,” Appl. Opt. 17, 300–307 (1978).
    [CrossRef] [PubMed]
  11. K. C. Kim, E. Griggs, W. B. Person, “Kilometer-Path Low Temperature Multiple-Reflection Cell for Laser Spectroscopy Using Tunable Semiconductor Diodes,” Appl. Opt. 17, 2511–2515 (1978).
    [CrossRef] [PubMed]
  12. J. Reid, B. K. Garside, J. Shewchun, M. El-Sherbiny, E. A. Ballik, “High Sensitivity Point Monitoring of Atmospheric Gases Employing Tunable Diode Lasers,” Appl. Opt. 17, 1806–1810 (1978).
    [CrossRef] [PubMed]
  13. J. Reid, M. El-Sherbiny, B. K. Garside, E. A. Ballik, “Sensitivity Limits of a Tunable Diode Laser Spectrometer, with Application to the Detection of NO2 at the 100-ppt Level,” Appl.Opt. 19, 3349–3354 (1980).
    [CrossRef] [PubMed]
  14. Commercial high performance multipass absorption cell available from Spectra-Physics, Inc. (1980).
  15. J. U. White, “Very Long Optical Paths in Air,” J. Opt. Soc. Am. 32, 285–288 (1942).
    [CrossRef]
  16. H. J. Bernstein, G. Herzberg, “Rotation–Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths,” J. Chem. Phys. 16, 30–38 (1948).
    [CrossRef]
  17. D. Horn, G. C. Pimentel, “2.5-km Low-Temperature Multiple-Reflection Cell,” Appl. Opt. 10, 1892–1898 (1971).
    [CrossRef] [PubMed]
  18. P. L. Hanst, “Spectroscopic Methods for Air Pollution Measurement,” Adv. Environ. Sci. Technol. 2, 91–165 (1971).
  19. J. U. White, “Very Long Optical Paths in Air,” J. Opt. Soc. Am. spectral instruments, 66, 411–416 (1976).
  20. E. O. Schulz-DuBois, “Generation of Square Lattice of Focal Points by a Modified White Cell,” Appl. Opt. 12, 1391–1393 (1973).
    [CrossRef] [PubMed]
  21. D. Herriot, H. Kogelnik, R. Kompfner, “Off-Axis Paths in Spherical Mirror Interferometers,” Appl. Opt. 3, 523–526 (1964).
    [CrossRef]
  22. D. R. Herriot, H. J. Schulte, “Folded Optical Delay Lines,” Appl. Opt. 4, 883–889 (1965).
    [CrossRef]
  23. J. Altmann, R. Baumgart, C. Weitkamp, “Two-Mirror Multipass Absorption Cell,” Appl. Opt. 20, 995–999 (1981).
    [CrossRef] [PubMed]
  24. S. M. Chernin, E. G. Barskaya, “Multipass Optical System,” U.S.S.R. Invention Brevet 1082162 (1985).
  25. S. M. Chernin, E. G. Barskaya, “Multipass Matrix System,” U.S.S.R. Invention Brevet 1091101 (1984).
  26. S. M. Chernin, E. G. Barskaya, “Multiple Pass Optical Matrix System,” U.S. Patent4,626,078 (1986); G.D.R. Patent DD 243627 (1987); G.D.R. Patent DD 245796 (1987); England Patent GB 2161290 (1987); German Patent DE 3390532 (1989); French Patent 2555738 (1986).
  27. S. M. Chernin, “Optical Multiple Reflection Chernin System,” U.S.S.R. Invention Brevet798678 (1981);S. M. Chernin, “Multiple Reflection Optical System,” U.S. Patent4,209,232 (1980).
  28. E. G. Barskaya, “Multipass Optical Cell,” U.S.S.R. Invention Brevet 206857 (1967).

1988 (1)

I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.

1987 (1)

R. L. Fork, F. A. Beisser, D. K. Fork, “Multipass Optical Amplifier Using a Double Confocal Resonator Geometry,” Rev. Phys. Appl. 22, 1665–1671 (1987).
[CrossRef]

1985 (1)

S. M. Chernin, E. G. Barskaya, “Multipass Optical System,” U.S.S.R. Invention Brevet 1082162 (1985).

1984 (1)

S. M. Chernin, E. G. Barskaya, “Multipass Matrix System,” U.S.S.R. Invention Brevet 1091101 (1984).

1981 (2)

D. E. Edwards, P. Baumeister, “Multiple-Pass Reflectometer,” Appl. Opt. 20, 3968–3971 (1981).

J. Altmann, R. Baumgart, C. Weitkamp, “Two-Mirror Multipass Absorption Cell,” Appl. Opt. 20, 995–999 (1981).
[CrossRef] [PubMed]

1980 (1)

J. Reid, M. El-Sherbiny, B. K. Garside, E. A. Ballik, “Sensitivity Limits of a Tunable Diode Laser Spectrometer, with Application to the Detection of NO2 at the 100-ppt Level,” Appl.Opt. 19, 3349–3354 (1980).
[CrossRef] [PubMed]

1978 (4)

1976 (4)

G. P. Semenova, V. G. Vorobyev, Yu. D. Pushkin, “An Attachment to Spectrophotometer to Measure the Absolute Values of High Reflection Coefficients,” Opt. Mekh. Prom. 4, 78–79 (1976), in Russian.

R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.

J. U. White, “Very Long Optical Paths in Air,” J. Opt. Soc. Am. spectral instruments, 66, 411–416 (1976).

J. Shewchun et al., “Pollution Monitoring Systems Based on Resonance Absorption Measurements of Ozone With a ‘Tunable’ CO2 Laser: Some Criteria,” Appl. Opt. 15, 340–346 (1976).
[CrossRef] [PubMed]

1975 (1)

F. Shimizu, H. Shwe, T. Tamayama, “Stark Spectroscopy by 10-μ Lasers Using a Multipath Cell,” J. Appl. Phys. 46, 258–259 (1975).
[CrossRef]

1973 (1)

1971 (2)

D. Horn, G. C. Pimentel, “2.5-km Low-Temperature Multiple-Reflection Cell,” Appl. Opt. 10, 1892–1898 (1971).
[CrossRef] [PubMed]

P. L. Hanst, “Spectroscopic Methods for Air Pollution Measurement,” Adv. Environ. Sci. Technol. 2, 91–165 (1971).

1967 (1)

E. G. Barskaya, “Multipass Optical Cell,” U.S.S.R. Invention Brevet 206857 (1967).

1965 (1)

1964 (1)

1948 (1)

H. J. Bernstein, G. Herzberg, “Rotation–Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths,” J. Chem. Phys. 16, 30–38 (1948).
[CrossRef]

1942 (1)

Altmann, J.

Arkhipov, R. N.

R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.

Arnon, O.

Ballik, E. A.

Barskaya, E. G.

S. M. Chernin, E. G. Barskaya, “Multipass Optical System,” U.S.S.R. Invention Brevet 1082162 (1985).

S. M. Chernin, E. G. Barskaya, “Multipass Matrix System,” U.S.S.R. Invention Brevet 1091101 (1984).

E. G. Barskaya, “Multipass Optical Cell,” U.S.S.R. Invention Brevet 206857 (1967).

S. M. Chernin, E. G. Barskaya, “Multiple Pass Optical Matrix System,” U.S. Patent4,626,078 (1986); G.D.R. Patent DD 243627 (1987); G.D.R. Patent DD 245796 (1987); England Patent GB 2161290 (1987); German Patent DE 3390532 (1989); French Patent 2555738 (1986).

Baumeister, P.

D. E. Edwards, P. Baumeister, “Multiple-Pass Reflectometer,” Appl. Opt. 20, 3968–3971 (1981).

O. Arnon, P. Baumeister, “Versatile High-Precision Multiple-Pass Reflectometer,” Appl. Opt. 17, 2913–2916 (1978).
[CrossRef] [PubMed]

Baumgart, R.

Beisser, F. A.

R. L. Fork, F. A. Beisser, D. K. Fork, “Multipass Optical Amplifier Using a Double Confocal Resonator Geometry,” Rev. Phys. Appl. 22, 1665–1671 (1987).
[CrossRef]

Bernstein, H. J.

H. J. Bernstein, G. Herzberg, “Rotation–Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths,” J. Chem. Phys. 16, 30–38 (1948).
[CrossRef]

Chernin, S. M.

S. M. Chernin, E. G. Barskaya, “Multipass Optical System,” U.S.S.R. Invention Brevet 1082162 (1985).

S. M. Chernin, E. G. Barskaya, “Multipass Matrix System,” U.S.S.R. Invention Brevet 1091101 (1984).

S. M. Chernin, E. G. Barskaya, “Multiple Pass Optical Matrix System,” U.S. Patent4,626,078 (1986); G.D.R. Patent DD 243627 (1987); G.D.R. Patent DD 245796 (1987); England Patent GB 2161290 (1987); German Patent DE 3390532 (1989); French Patent 2555738 (1986).

S. M. Chernin, “Optical Multiple Reflection Chernin System,” U.S.S.R. Invention Brevet798678 (1981);S. M. Chernin, “Multiple Reflection Optical System,” U.S. Patent4,209,232 (1980).

Edwards, D. E.

D. E. Edwards, P. Baumeister, “Multiple-Pass Reflectometer,” Appl. Opt. 20, 3968–3971 (1981).

El-Sherbiny, M.

J. Reid, M. El-Sherbiny, B. K. Garside, E. A. Ballik, “Sensitivity Limits of a Tunable Diode Laser Spectrometer, with Application to the Detection of NO2 at the 100-ppt Level,” Appl.Opt. 19, 3349–3354 (1980).
[CrossRef] [PubMed]

J. Reid, B. K. Garside, J. Shewchun, M. El-Sherbiny, E. A. Ballik, “High Sensitivity Point Monitoring of Atmospheric Gases Employing Tunable Diode Lasers,” Appl. Opt. 17, 1806–1810 (1978).
[CrossRef] [PubMed]

Fork, D. K.

R. L. Fork, F. A. Beisser, D. K. Fork, “Multipass Optical Amplifier Using a Double Confocal Resonator Geometry,” Rev. Phys. Appl. 22, 1665–1671 (1987).
[CrossRef]

Fork, R. L.

R. L. Fork, F. A. Beisser, D. K. Fork, “Multipass Optical Amplifier Using a Double Confocal Resonator Geometry,” Rev. Phys. Appl. 22, 1665–1671 (1987).
[CrossRef]

Garside, B. K.

Griggs, E.

Hanst, P. L.

P. L. Hanst, “Spectroscopic Methods for Air Pollution Measurement,” Adv. Environ. Sci. Technol. 2, 91–165 (1971).

Herriot, D.

Herriot, D. R.

Herzberg, G.

H. J. Bernstein, G. Herzberg, “Rotation–Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths,” J. Chem. Phys. 16, 30–38 (1948).
[CrossRef]

Horn, D.

Khoroshilov, E. V.

I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.

Kim, K. C.

Kogelnik, H.

Kompfner, R.

Kryukov, I. V.

I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.

Kryukov, P. G.

I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.

Person, W. B.

Pimentel, G. C.

Pushkin, Yu. D.

G. P. Semenova, V. G. Vorobyev, Yu. D. Pushkin, “An Attachment to Spectrophotometer to Measure the Absolute Values of High Reflection Coefficients,” Opt. Mekh. Prom. 4, 78–79 (1976), in Russian.

Reid, J.

Schulte, H. J.

Schulz-DuBois, E. O.

Semenova, G. P.

G. P. Semenova, V. G. Vorobyev, Yu. D. Pushkin, “An Attachment to Spectrophotometer to Measure the Absolute Values of High Reflection Coefficients,” Opt. Mekh. Prom. 4, 78–79 (1976), in Russian.

Sharkov, A. V.

I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.

Shewchun, J.

Shikanov, A. S.

R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.

Shimizu, F.

F. Shimizu, H. Shwe, T. Tamayama, “Stark Spectroscopy by 10-μ Lasers Using a Multipath Cell,” J. Appl. Phys. 46, 258–259 (1975).
[CrossRef]

Shwe, H.

F. Shimizu, H. Shwe, T. Tamayama, “Stark Spectroscopy by 10-μ Lasers Using a Multipath Cell,” J. Appl. Phys. 46, 258–259 (1975).
[CrossRef]

Tamayama, T.

F. Shimizu, H. Shwe, T. Tamayama, “Stark Spectroscopy by 10-μ Lasers Using a Multipath Cell,” J. Appl. Phys. 46, 258–259 (1975).
[CrossRef]

Valuev, A. D.

R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.

Vasin, B. L.

R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.

Vorobyev, V. G.

G. P. Semenova, V. G. Vorobyev, Yu. D. Pushkin, “An Attachment to Spectrophotometer to Measure the Absolute Values of High Reflection Coefficients,” Opt. Mekh. Prom. 4, 78–79 (1976), in Russian.

Weitkamp, C.

White, J. U.

J. U. White, “Very Long Optical Paths in Air,” J. Opt. Soc. Am. spectral instruments, 66, 411–416 (1976).

J. U. White, “Very Long Optical Paths in Air,” J. Opt. Soc. Am. 32, 285–288 (1942).
[CrossRef]

Adv. Environ. Sci. Technol. (1)

P. L. Hanst, “Spectroscopic Methods for Air Pollution Measurement,” Adv. Environ. Sci. Technol. 2, 91–165 (1971).

Appl. Opt. (11)

D. Horn, G. C. Pimentel, “2.5-km Low-Temperature Multiple-Reflection Cell,” Appl. Opt. 10, 1892–1898 (1971).
[CrossRef] [PubMed]

E. O. Schulz-DuBois, “Generation of Square Lattice of Focal Points by a Modified White Cell,” Appl. Opt. 12, 1391–1393 (1973).
[CrossRef] [PubMed]

D. E. Edwards, P. Baumeister, “Multiple-Pass Reflectometer,” Appl. Opt. 20, 3968–3971 (1981).

D. Herriot, H. Kogelnik, R. Kompfner, “Off-Axis Paths in Spherical Mirror Interferometers,” Appl. Opt. 3, 523–526 (1964).
[CrossRef]

D. R. Herriot, H. J. Schulte, “Folded Optical Delay Lines,” Appl. Opt. 4, 883–889 (1965).
[CrossRef]

J. Shewchun et al., “Pollution Monitoring Systems Based on Resonance Absorption Measurements of Ozone With a ‘Tunable’ CO2 Laser: Some Criteria,” Appl. Opt. 15, 340–346 (1976).
[CrossRef] [PubMed]

J. Reid, J. Shewchun, B. K. Garside, E. A. Ballik, “High Sensitivity Pollution Detection Employing Tunable Diode Lasers,” Appl. Opt. 17, 300–307 (1978).
[CrossRef] [PubMed]

J. Reid, B. K. Garside, J. Shewchun, M. El-Sherbiny, E. A. Ballik, “High Sensitivity Point Monitoring of Atmospheric Gases Employing Tunable Diode Lasers,” Appl. Opt. 17, 1806–1810 (1978).
[CrossRef] [PubMed]

K. C. Kim, E. Griggs, W. B. Person, “Kilometer-Path Low Temperature Multiple-Reflection Cell for Laser Spectroscopy Using Tunable Semiconductor Diodes,” Appl. Opt. 17, 2511–2515 (1978).
[CrossRef] [PubMed]

O. Arnon, P. Baumeister, “Versatile High-Precision Multiple-Pass Reflectometer,” Appl. Opt. 17, 2913–2916 (1978).
[CrossRef] [PubMed]

J. Altmann, R. Baumgart, C. Weitkamp, “Two-Mirror Multipass Absorption Cell,” Appl. Opt. 20, 995–999 (1981).
[CrossRef] [PubMed]

Appl.Opt. (1)

J. Reid, M. El-Sherbiny, B. K. Garside, E. A. Ballik, “Sensitivity Limits of a Tunable Diode Laser Spectrometer, with Application to the Detection of NO2 at the 100-ppt Level,” Appl.Opt. 19, 3349–3354 (1980).
[CrossRef] [PubMed]

J. Appl. Phys. (1)

F. Shimizu, H. Shwe, T. Tamayama, “Stark Spectroscopy by 10-μ Lasers Using a Multipath Cell,” J. Appl. Phys. 46, 258–259 (1975).
[CrossRef]

J. Chem. Phys. (1)

H. J. Bernstein, G. Herzberg, “Rotation–Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing Paths,” J. Chem. Phys. 16, 30–38 (1948).
[CrossRef]

J. Opt. Soc. Am. (1)

J. Opt. Soc. Am. spectral instruments (1)

J. U. White, “Very Long Optical Paths in Air,” J. Opt. Soc. Am. spectral instruments, 66, 411–416 (1976).

Kvantovaya Elektron. (2)

R. N. Arkhipov, A. D. Valuev, B. L. Vasin, A. S. Shikanov, “Compact Optical Delay Line OLZ-M,” Kvantovaya Elektron. 3, 1861–0000 (1976), in Russian.

I. V. Kryukov, P. G. Kryukov, E. V. Khoroshilov, A. V. Sharkov, “Generation and Amplification of Light Impulses Shorter Than 50 fs with Repetition Frequency of 10 kHz,” Kvantovaya Elektron. 15, 1320–1322 (1988), in Russian.

Opt. Mekh. Prom. (1)

G. P. Semenova, V. G. Vorobyev, Yu. D. Pushkin, “An Attachment to Spectrophotometer to Measure the Absolute Values of High Reflection Coefficients,” Opt. Mekh. Prom. 4, 78–79 (1976), in Russian.

Rev. Phys. Appl. (1)

R. L. Fork, F. A. Beisser, D. K. Fork, “Multipass Optical Amplifier Using a Double Confocal Resonator Geometry,” Rev. Phys. Appl. 22, 1665–1671 (1987).
[CrossRef]

U.S.S.R. Invention Brevet (3)

S. M. Chernin, E. G. Barskaya, “Multipass Optical System,” U.S.S.R. Invention Brevet 1082162 (1985).

S. M. Chernin, E. G. Barskaya, “Multipass Matrix System,” U.S.S.R. Invention Brevet 1091101 (1984).

E. G. Barskaya, “Multipass Optical Cell,” U.S.S.R. Invention Brevet 206857 (1967).

Other (4)

S. M. Chernin, E. G. Barskaya, “Multiple Pass Optical Matrix System,” U.S. Patent4,626,078 (1986); G.D.R. Patent DD 243627 (1987); G.D.R. Patent DD 245796 (1987); England Patent GB 2161290 (1987); German Patent DE 3390532 (1989); French Patent 2555738 (1986).

S. M. Chernin, “Optical Multiple Reflection Chernin System,” U.S.S.R. Invention Brevet798678 (1981);S. M. Chernin, “Multiple Reflection Optical System,” U.S. Patent4,209,232 (1980).

MIRAN, Portable Ambient Air Analyzers, Foxboro/Wilks, Inc., Printed in USA (1980).

Commercial high performance multipass absorption cell available from Spectra-Physics, Inc. (1980).

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Figures (6)

Fig. 1
Fig. 1

Multipass three-objective matrix system.

Fig. 2
Fig. 2

Multipass four-objective matrix system: (a) field mirrors and (b) mirror objectives positioned on the round mount.

Fig. 3
Fig. 3

Picture of the matrix of the focal points on the field mirrors after 306 passes of He–Ne laser radiation in the four-objective matrix system.

Fig. 4
Fig. 4

Possible arrangement of the objectives along a single line for the three-objective matrix system.

Fig. 5
Fig. 5

Possible arrangement of the objectives in one line for the four-objective matrix system.

Fig. 6
Fig. 6

Spectra obtained using the semiconductor laser spectrometer with the multipass matrix four-objective cell. The pressure of atmospheric air is 30 torr. The concentration of sulfuric anhydride is 30 ppm. The optical path length is 81 m (90 passes). (a) The narrow absorption peaks belong to the oscillation–rotation line of the SO2(ν3) band; the broad line corresponds to adsorption by atmospheric water outside the cell; close to the apex of the broad line a narrow line of absorption of water vapor is indicated. (b) The calibration spectrum of the Fabry-Perot standard (the free dispersion domain is 0.0397 cm−1). (c) the spectrum of absorption coefficient SO2(ν3).

Tables (2)

Tables Icon

Table I Examples of Matrices of Focal Points for Intermediate Images

Tables Icon

Table II Matrices of Focal Points During Adjustment of the Multipass System

Equations (2)

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N = 2 ( m n 1 ) ,
N = ( m 1 ) ( 4 n 2 ) ,

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