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892-00000-000-05-201302 1

Apex Data Sheet

Description

The Ocean Optics Apex 784 Raman Spectrometer includes the linear, back-thinned, FFT-CCD-array

detector from Hamamatsu (product number S11510-1106) in an optical bench with all the circuits

necessary for spectrometer operation. The result is a high-resolution, high-sensitivity scientific

instrument for low-light level applications such as 785 nm Raman analysis and fluorescence. For

complete details on this detector, visit www.Hamamatsu.com.

The Apex Spectrometer electronics have been designed for USB connection to various accessories and

receives power from a computer through its USB interface. The Apex is a microcontroller-controlled

spectrometer, thus all operating parameters are implemented through software interfacing to the unit.

Summary of content (14 pages)

PAGE 1
Apex Data Sheet Description The Ocean Optics Apex 784 Raman Spectrometer includes the linear, back-thinned, FFT-CCD-array detector from Hamamatsu (product number S11510-1106) in an optical bench with all the circuits necessary for spectrometer operation. The result is a high-resolution, high-sensitivity scientific instrument for low-light level applications such as 785 nm Raman analysis and fluorescence. For complete details on this detector, visit www.Hamamatsu.com.
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Apex Data Sheet Features         Back-thinned Hamamatsu uncooled detector S11510-1106 High-throughput Virtual Slit Resolution (FWHM): <10 cm-1 @ 800 nm Electrical Performance - 16 bit A/D converter Communications: USB Software compatibility: - SpectraSuite (1 complimentary license included with purchase) - OmniDriver (sold separately) - USB Programmer (available free from Ocean Optics) - SeaBreeze (sold separately) Optical input: SMA 905 Regulations: - CE Mark - RoHS Specifications 2 Specific
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Apex Data Sheet Mechanical Diagrams Apex 785 – Bottom Apex 785 – Front 892-00000-000-05-201302 3
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Apex Data Sheet Apex 785 – Right Side Apex Spectrometer Detector The Apex contains a Hamamatsu S11510-1106 two-dimensional CCD. The Apex electronics only support reading out the device as a 1-D array (e.g., all rows are summed together on chip). The structure of the Apex spectrometer Hamamatsu CCD is shown below. The device has 2048 x 64 active pixels and a total of 2068 x 70 pixels.
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Apex Data Sheet Apex CCD Device structure (64 active vertical pixels and 2048 active horizontal pixels) Apex USB Port Interface Communications and Control Information The Apex is a microcontroller-based Miniature Fiber Optic Spectrometer that can communicate via the Universal Serial Bus. This section contains the necessary command information for controlling the Apex via the USB interface.
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Apex Data Sheet Instruction Set Command Syntax The list of the commands is shown in the following table followed by a detailed description of each command. The length of the data depends on the command. All commands are sent to the Maya through End Point 1 Out (EP1). All spectra data is acquired through End Point 2 In and all other queries are retrieved through End Point 1 In (EP1).
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Apex Data Sheet Byte 0 Byte 1 Byte 2 … Byte n-1 Command Byte Command Specific Command Specific … Command Specific Initialize Apex Initializes certain parameters on the Apex and sets internal variables based on the USB communication speed the device is operating at. This command should be called at the start of every session however if the user does not call it, it will be executed on the first Request Scan command.
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Apex Data Sheet Configuration Index - Description 0 – Serial Number th 1 – 0 order Wavelength Calibration Coefficient st 2 – 1 order Wavelength Calibration Coefficient nd 3 – 2 order Wavelength Calibration Coefficient rd 4 – 3 order Wavelength Calibration Coefficient 5 – Stray light constant th 6 – 0 order non-linearity correction coefficient st 7 – 1 order non-linearity correction coefficient nd 8 – 2 order non-linearity correction coefficient rd 9 – 3 order non-linearity correction coefficient th 10 – 4
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Apex Data Sheet Request Spectra Initiates spectra acquisition. The Apex will acquire a complete spectra (2068 data values). The data is returned in bulk transfer mode through EP2. The table below provides the pixel order for the two different speeds. The pixel values are decoded as described below. Byte Format Byte 0 0x09 Return Format The format for the returned spectral data is dependant upon the USB communication speed. The format for both High Speed (480 Mbps) and Full Speed (12Mbps) is shown below.
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Apex Data Sheet Packet 0 Byte 0 Byte 1 Byte 2 Byte 3 Pixel 0 LSB … Pixel 0 MSB Pixel 1 LSB Pixel 2 MSB Byte 510 Byte 511 Pixel 255 LSB Pixel 255 MSB Packet 18 – Synchronization Packet (1 byte) Byte 0 0x69 USB Full Speed (12Mbps) Packet Format In this mode all data is read from EP2In. The pixel and packet format is shown below.
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Apex Data Sheet All data values are 16 bit values transferred in MSB | LSB order. This command requires 100us to complete; the calling program needs to delay for this length of time before issuing another command. In some instances, other commands will also write to these registers (i.e., integration time), in these cases the user has the options of setting the parameters through 2 different methods.
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Apex Data Sheet Read Register Information Reads the values from any of the registers above. This command is sent to End Point 1 Out and the data is retrieved through End Point 1 In. Byte Format Byte 0 Byte 1 0x6B Register Value Return Format (EP1In) Byte 0 Byte 1 Byte 2 Register Value Value MSB Value LSB Read Irradiance Factors Reads 60 bytes of data, which is utilized for Irradiance Calibration information from the desired EEPROM memory address.
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Apex Data Sheet Byte Format Byte 0 0xFE Return Format The data is returned in Binary format and read in by the host through End Point 1 In. The structure for the return information is as follows Byte Description Comments 0-1 Number of Spectral Data Values – WORD(s) LSB | MSB order Integration Time - WORD Integration time in µs – LSW | MSW.
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