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IS640-17 LWIR Lenses

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Lenses for the IS640 / IS640-17 LWIR camera for microscopic and macroscopic temperature measurement and analysis.
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    OverviewApplicationsFeaturesSpecifications

    Overview

    We developed a full suite of infrared lenses, enabling both microscopic and macroscopic temperature measurement.  Lenses are manufactured from Germanium, Zinc Selenide, and Zinc Sulfide with anti-reflective coatings for maximum transmission in the long wave infrared region.  Each lens is designed for maximum sensitivity, long working distance, and with minimum distortion for clear, precise imaging.  We developed a bayonet-style mechanical interface enabling quick lens attachment and removal while maximizing thermal uniformity between the lens and camera body to maintain the high measurement accuracy. 

    Applications

    • Semiconductor device failure analysis
    • Circuit board failure analysis
    • Microscopic temperature measurement and analysis of materials

    Features

    Comprehensive Calibration

    Each lens is calibrated while installed on the camera, resulting in unsurpassed accuracy and measurement uniformity across the entire field-of-view.

    Specifications

    Optics


    Pixel Resolution

    Focus

    Working Distance

    Field of View

    Focal Length

    Working F/#

    Object Space NA

    Depth of Field

    [PN0118] IS640-17 LWIR Lenses (5 micron)

    5 µm


    Fixed

    19.5 mm


    3.2 x 2.4 mm



    20.6 mm



    2.62


    0.65

    ±15µm


    [PN1112] IS640-17 LWIR Lenses (C 5 Micron)

    5 µm

    Fixed

    19 mm

    3.2 x 2.4 mm

    15.7 mm

    2.84

    0.60

    ±15µm

    [PN0653] IS640-17 LWIR Lenses (10 micron)

    10 µm


    Fixed

    20 mm


    6.4 x 4.8 mm


    40.9 mm


    1.41

    0.60

    ±25µm


    [PN0116] IS640-17 LWIR Lenses (20 micron)

    20 µm


    Fixed

    31 mm


    12.8 x 9.6 mm


    36.4 mm


    1.09

    0.39

    ±40µm


    [PN0910] IS640-17 LWIR Lenses (20 micron LWD)

    20 µm

    Fixed

    44 mm

    12.8 x 9.6 mm

    36 mm

    1.18

    0.36

    ±40µm

    [PN1108] IS640-17 LWIR Lenses (C 20 micron)

    20 µm

    Fixed

    35.3 mm

    12.8 x 9.6 mm

    32.7 mm

    1.15

    0.35

    ±40µm

    [PN0117] IS640-17 LWIR Lenses (40 micron)

    40 µm


    Fixed

    27 mm


    25.6 x 19.2 mm


    15.2 mm


    0.76

    0.28

    ±120µm


    [PN0911] IS640-17 LWIR Lenses (40 micron LWD)

    40 µm

    Fixed

    86 mm

    25.6 x 19.2 mm

    35 mm

    1.02

    0.21

    ±120µm

    [PN0119] IS640-17 LWIR Lenses (80 micron)

    80 µm


    Fixed

    69 mm

    51.2 x 38.4 mm


    16.3 mm


    1.05

    0.10

    ±900µm

    [PN1113] IS640-17 LWIR Lenses (C 80 Micron)

    80 µm

    Fixed

    116 mm

    51.2 x 38.4 mm

    14.4 mm

    1.11

    0.10

    ±900µm

    [PN0120] IS640-17 LWIR Lenses (Variable Focus Macro)

    140 μm min  resolution (at 100 mm WD)

    Manual

    100 mm to infinity

    89.6 x 67.2 mm minimum

    12 mm

    1.00

    0.003

    Dependent on working distance

    [PN1111] IS640-17 LWIR Lenses (WFOV Variable Focus)

    40 μm (15 mm WD*)

    961 µm (778 mm WD)

    Manual

    15 to 778 mm

    25.6 x 19.2 mm
    (15 mm WD)

    615 x 461 mm
    (778 mm WD)

    15.1 mm
    (15 mm WD)

    1.13
    (15 mm WD)

    0.202
    (15 mm WD)

    ±300µm
    (15 mm WD)

    * Working distance

    Measurement


    Calibration range †

    Sensitivity (NETD) ‡

    Accuracy

    [PN0118] IS640-17 LWIR Lenses (5 micron)

    		10 to 300°C *< 300 mKNon-radiometric (designed for lock-in thermography testing and spatial/temporal relative measurements)

    [PN1112] IS640-17 LWIR Lenses (C 5 Micron)

    		10 to 300°C *< 300 mKNon-radiometric (designed for lock-in thermography testing and spatial/temporal relative measurements)

    [PN0653] IS640-17 LWIR Lenses (10 micron)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 50 mK (60 Hz)
    High range: < 90 mK (60 Hz)    		Low range: ± 2°C
    High range: ± 2°C or 2% of reading §

    [PN0116] IS640-17 LWIR Lenses (20 micron)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: ± 2°C
    High range: ± 2°C or 2% of reading §

    [PN0910] IS640-17 LWIR Lenses (20 micron LWD)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: ± 2°C
    High range: ± 2°C or 2% of reading §

    [PN1108] IS640-17 LWIR Lenses (C 20 micron)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: ± 2°C
    High range: ± 2°C or 2% of reading §

    [PN0117] IS640-17 LWIR Lenses (40 micron)

    		Low range: 10 to 60°C *
    High range: 10 to 250°C    		Low range: < 25 mK (60 Hz)
    High range: < 50 mK (60 Hz)    		Non-radiometric (designed for lock-in thermography testing and spatial/temporal relative measurements)

    [PN0911] IS640-17 LWIR Lenses (40 micron LWD)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: ± 2°C
    High range: ± 2°C or 2% of reading §

    [PN0119] IS640-17 LWIR Lenses (80 micron)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: +/-2°C
    High range: +/-2°C or 2% of reading §

    [PN1113] IS640-17 LWIR Lenses (C 80 Micron)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: +/-2°C
    High range: +/-2°C or 2% of reading §

    [PN0120] IS640-17 LWIR Lenses (Variable Focus Macro)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: +/-2°C
    High range: +/-2°C or 2% of reading §

    [PN1111] IS640-17 LWIR Lenses (WFOV Variable Focus)

    		Low range: 10 to 80°C *
    High range: 10 to 300°C    		Low range: < 35 mK (60 Hz)
    High range: < 70 mK (60 Hz)    		Low range: +/-2°C
    High range: +/-2°C or 2% of reading §

    * Sentris low range calibrations are optimized for highest sensitivity and may have reduced calibration range.

    † The calibration range stated in the specification indicates the range of black-body temperatures used during calibration. Temperature measurements outside of the stated range may be able to be performed but may not meet the specified measurement accuracy.

    ‡ Noise Equivalent Temperature Difference (NETD) specifies the smallest temperature difference that can be detected. The value stated is NETD at 60 Hz frame rate. Activating real-time image averaging can improve NETD but will increase the measurement response time.

    § whichever is greater


    Optical Magnification Comparison

    Optical magnification is calculated by dividing the sensor pixel size (17µm) by the lens image pixel size.

    Image pixel size
    		Optical Magnification
    80µm
    		17/80 = 0.2125x
    40µm
    		17/40 = 0.425x
    20µm
    		17/20 = 0.85x
    10µm  
    		17/10 = 1.7x
    5µm
    		17/5 = 3.4x


    Width of a line in micrometers in USAF Resolving Power Test Target 1951


    		Group Number-2-10123456789
    Element













    1 2000.001000.00
    		500.00
    		250.00
    		125.00
    		62.50
    		31.25
    		15.63
    		7.81
    		3.91
    		1.95
    		0.98
    2
    		1781.80
    		890.90
    		445.45
    		222.72
    		111.36
    		55.68
    		27.84
    		13.92
    		6.96
    		3.48
    		1.74
    		0.87
    3
    		1587.40
    		793.70
    		396.85
    		198.43
    		99.21
    		49.61
    		24.80
    		12.40
    		6.20
    		3.10
    		1.55
    		0.78
    4
    		1414.21
    		707.11
    		353.55
    		176.78
    		88.39
    		44.19
    		22.10
    		11.05
    		5.52
    		2.76
    		1.38
    		0.69
    5
    		1259.92
    		629.96
    		314.98
    		157.49
    		78.75
    		39.37
    		19.69
    		9.84
    		4.92
    		2.46
    		1.23
    		0.62
    6
    		1122.46
    		561.23
    		280.62
    		140.31
    		70.15
    		35.08
    		17.54
    		8.77
    		4.38
    		2.19
    		1.10
    		0.55

    Figure 1: From left to right: USAF 1951 chart from Macro, 80µm, 40µm, 20µm, 10µm, 5µm lens perspective