http://blog.razerzone.com/2007/10/30/the-razer-3g-laser-technology-%e2%80%93-our-statement/6 {; n/ O: t& S x
_中国专业的IT产品及技术论坛|电脑硬件故障咨询|数码产品咨询|软件技术答疑/ V5 S: g% T2 a* D) _) G
There’s a lot of confusion out there about what makes a laser gaming mouse great. In developing the 3G laser for the Lachesis, we are confident that we can clear everything up and tell you what makes a Razer mouse the last word for gaming. Here’s a brief explanation of what’s new, and also what’s always been around in Razer sensors.
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助5 t' K& H% b: V2 \( R
1. How does the sensor work?
西南IT,西部IT,成都IT,重庆IT,远望资讯,电脑秀,微型计算机,新潮电子,计算机应用文摘,pcshow.net,电脑配件,数码产品,数字家庭,Digital Home,HDTV,GPS,LanParty,硬件,软件,极品,IT论坛,bbs,极限超频,MOD,电脑改装' h. ] R3 @$ B1 L: Y: }
a.The 3G laser sensor uses two lasers while maintaining perfect eye safety.
4 e3 d0 h$ A2 Q( T6 K& I+ eBoth lasers are focused on to a flat surface (your mouse mat, for instance),
$ t5 b, @! W' |( o电脑秀PCShow.net_IT社区and each laser reads out 8 million samples per second, one for the X-axis, and one for the Y-axis.
itbbs.pcshow.net5 S7 _6 _) P; {9 }5 s, w l) n) v3 ~
Each sample is calculated by the sensor, and the direction and speed of the mouse movement is determined (so it results in real-time and instantaneous motion detection). For each 1ms (yes, that’s a millisecond, or 1/1000 of a second) of data sent by the Lachesis to your computer, over 16,000 different samples are processed to give an “accurate to the millisecond” measure of direction and movement.
; C1 k1 ^$ Y) _( w/ ]itbbs.pcshow.netA large number of computations are run on the data on each directional sensor (i.e. one set of computations are run on X and one set on Y) within this millisecond. Speed and direction are computed via a dedicated Digital Signal Processor (DSP) in the sensor, producing direction and information data independently for each axis. This large number of samples and the great speed at which it is processed results in a highly accurate “snapshot” of how far and in what direction the mouse has moved in that millisecond.
itbbs.pcshow.net, }2 [% X% @0 h- @6 B K; \) n5 l P
b. Each laser measures the interference caused by the beam’s own waves upon being reflected back into the laser. This result is very high surface compatibility on almost any surface the laser beam is capable of reflecting off.
& T7 v1 W) T1 E% k1 ~电脑秀PCShow.net_IT社区c. The DSP calculates the data from each sensor based on the interference received and produces a final result of X/Y movement.
西南IT,西部IT,成都IT,重庆IT,远望资讯,电脑秀,微型计算机,新潮电子,计算机应用文摘,pcshow.net,电脑配件,数码产品,数字家庭,Digital Home,HDTV,GPS,LanParty,硬件,软件,极品,IT论坛,bbs,极限超频,MOD,电脑改装. _. w, Y5 O: ], n/ a1 l& l# s
d. The movement reported by the Lachesis to the PC can be as high as 256.000cps per X/Y axis, which makes half a million cps for the resulting vector cursor speed, each and every single count produced by the 3G laser sensor at any resolution.
$ V$ J" C0 n) L_中国专业的IT产品及技术论坛|电脑硬件故障咨询|数码产品咨询|软件技术答疑So, in effect, there are two sensors in the Lachesis, each sensor generates its own mouse movement data. Contrast this with the second generation of lasers, where only one sensor is used to compute both X and Y displacement in speed, resulting in some inevitable optimizations and errors for movements in specific directions.
4 G- \' R6 d7 u: W3 C% M_中国专业的IT产品及技术论坛|电脑硬件故障咨询|数码产品咨询|软件技术答疑There is no compromise on the Y axis simply to provide better performance on the X axis, and vice versa. There’s no artificial smoothing of the lines you draw, or cheats to “interpret” your hand movements into what we think is “right”, as X and Y data are provided independently of each other.
: k& b- B$ N1 ?5 `
2. How tunable is the DPI?
+ \5 W( s, Z4 {& qa. The sensor is capable of DPI increments from 125 to 4000 in steps of 125. We understand that 4000 DPI isn’t for everyone and we feel that this allows you the maximum flexibility in setting your own precision level based on your needs. For example:
" H( k' _/ i% g& k( w6 ~2 n电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助i.A game requires a total of 6750 “dots” or “counts” to turn 180°. You would like to be able to turn this in 6” on your mouse pad. Therefore the formula you would use to set your Lachesis would be: 6750 dots / 6 inches = 1125DPI to get the optimum result. You could also set your mouse to 2500DPI and then use our driver or the in-game sensitivity slider to half sensitivity, which would produce the same result, except that you would be adding an additional calculation between your mouse and the game.
西南IT,西部IT,成都IT,重庆IT,远望资讯,电脑秀,微型计算机,新潮电子,计算机应用文摘,pcshow.net,电脑配件,数码产品,数字家庭,Digital Home,HDTV,GPS,LanParty,硬件,软件,极品,IT论坛,bbs,极限超频,MOD,电脑改装6 [3 J* j6 |) d2 i+ n: m" \
ii.You also snipe in-game, but prefer slower movement with the sniper scope. You can set another button to instantly bring up 750DPI (for example) for this purpose.
电脑秀PCShow.net_IT社区' ?' U# l( A) ~1 P+ t( q
iii.In Windows you have a screen resolution of 2560×1600. When surfing the Internet, you may prefer to be able to move across the screen within one inch, in which case your DPI should be set at 2500DPI. The Lachesis driver can intelligently change the DPI based on what application is loaded if you choose to configure it in this manner, or you can change the DPI yourself with the touch of a button.
itbbs.pcshow.net, p# @8 T- P2 H- a2 o
b.The Lachesis gives you maximum flexibility by allowing you to preset up to 5 DPI settings on 5 different profiles, for a total of 25 different DPI settings. Or, if you so choose, you can have just 1, or 2, or 3. The option is there to customize to your needs, and the best part is you can take these settings with you wherever you go, without having to install our drivers.
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助! w; B7 `6 w0 i3 p( U' V5 g+ [
3. What’s the top speed? How does it control? Is there acceleration?
西南IT,西部IT,成都IT,重庆IT,远望资讯,电脑秀,微型计算机,新潮电子,计算机应用文摘,pcshow.net,电脑配件,数码产品,数字家庭,Digital Home,HDTV,GPS,LanParty,硬件,软件,极品,IT论坛,bbs,极限超频,MOD,电脑改装: M3 I9 k( Z7 F" p& C; ^
a.Sensors have various levels of surface compatibility (i.e. how well they work on different materials, like a wooden desk or a cloth mat). For a normal office laser mouse, this means that it will work well on both a highly polished table or a normal mouse pad at certain low speeds (usually below 20 inches per second, or IPS).
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助0 P/ O/ K0 Q+ C8 v: D! Y( E: U
b.At higher speeds, sensors designed for gaming have consistent performance, while normal sensors will start to produce dramatic errors. For example, when turning quickly in an FPS you may suddenly find yourself looking at the sky or your feet; not a good situation if someone is creeping up behind you with a gun. So although the sensor may still be sending data at a high speed, the data is in effect junk and worse than useless – these errors may be hazardous to your virtual health!
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助; Z( ?! U! a7 A: K7 X6 \1 C
c.Acceleration is a term used to describe the mouse covering differing amount of pixels based on how fast the mouse is moved.
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助- M- w" B4 W9 B! I# @2 i
Example:
`. z: ]- A- Y0 B% [ H
Very slowly (at less than 1IPS) I move my mouse 4”. I cover 2400 pixels on a Windows monitor (perhaps equivalent to a 90° turn in my FPS). My mouse is performing at 2400 dots / 4 inches = 600DPI.
- H* B8 B' V' q. a" S* g0 ]电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助I then do a motion covering the same 4”, but this time I move my hand much faster. I cover only 1800 pixels in Windows (and not quite a 90° turn in the same FPS). My mouse at a higher speed is performing inconsistently: 1800 dots / 4 inches = 450DPI.
电脑秀PCShow.net_IT社区 G/ K, }' x6 Y2 U) Q; a4 y
In this example, I am experiencing negative acceleration when I move my mouse quickly. This is most likely caused by the mouse sensor not being able to cope properly with the high speed and the surface it is being operated on.
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助7 H. x0 U1 I( O9 D! B/ z
The 3G laser will operate comfortably up to 100IPS, giving you perfect control at the speed on a multitude of surfaces. That means you will not experience negative effects of acceleration like with other sensors that are incapable of high speeds and unable to cope with the speed and/or surface that it is on.
itbbs.pcshow.net6 \% {0 g$ t# i; t5 S% s. K/ w
Note: the 3G laser sensor at 4000DPI has a maximum speed of 64.3 IPS (the sensor is rated 60IPS to 100IPS). This is due to the amount of data being processed at high resolution and is not due to a sensing error. If you are using broad sweeping motions in your gameplay, chances are you will benefit from a lower DPI setting, and the 3G laser sensor is more than capable of accommodating you with a minimum DPI setting of 125, with increments of 125 to tailor to your own requirements.
itbbs.pcshow.net. C1 Z3 f3 r }# }9 B" \& V" u
Beyond 64.3IPS at 4000DPI, what happens with the 3G Laser sensor is that it tops out without causing errors. This is basically a speed limit to ensure the 4000DPI is read correctly; from our research this is a reasonable trade off for such high DPI (i.e. fast physical motion isn’t necessary at this high DPI).
_中国专业的IT产品及技术论坛|电脑硬件故障咨询|数码产品咨询|软件技术答疑& u4 s* p3 @4 I4 g
d.In the end, the top speed of any sensor is the rate at which you can move it while maintaining perfect control. All other numbers, from samples per second to megapixels have to live or die by the amount of control you can get from your mouse.
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助6 x1 x- v. n* I8 ~" m; D( V& e
For the 3G Laser sensor, you can get perfect control up to 100IPS and we stand by this.
电脑秀-IT社区－电脑秀网站国内专业的IT产品及技术论坛 产品讨论 技术探索 术语解释 投诉求帮助7 r& X3 V4 h# w6 N! \* M$ G
If you’re still with me, thank you for reading what must seemed to have been a pretty dry technical discussion. For other queries or feedback, please drop them off here . I’ll be monitoring the comments, and will try to provide consolidated answers where possible.
